Mitt Romney is poised to clinch the Republican presidential nomination after today’s Texas primary, a largely uncontested election which will formalise the former Massachusetts governor’s status as President Barack Obama’s general election challenger.

Mitt Romney’s foreign policy vacillation typifies how the Republican Party has struggled to keep up with developments, says Leslie H Gelb

Republican candidate Newt Gingrich has officially announced that his campaign for his party's US Presidential nomination is over.

Newt Gingrich is planning to officially end his campaign for the US Republican presidential nomination with an announcement in Arlington, Virginia, today.

President Barack Obama poked fun at his likely presidential rival Mitt Romney and Republican opponents in Congress, including a dig at Romney’s treatment of a pet dog, at the annual White House Correspondents’ Association dinner.

Barack Obama will headline his first re-election rallies next week.

With the Republican presidential nomination all but in hand, Mitt Romney is refocusing his efforts on challenging President Barack Obama, raising cash for what may be the most expensive presidential contests in American history.

Mitt Romney’s path to becoming Republican presidential candidate has cleared further with advisers to rival Newt Gingrich saying he will formally end his campaign next week.

Mitt Romney has laid claim to a fiercely-contested Republican presidential nomination by sweeping five primary contests.

Rick Santorum dropped out of the race for the US Republican presidential nomination, leaving the field clear for Mitt Romney as the party’s likely choice to challenge President Barack Obama.

Mitt Romney tightened his grip on the Republican presidential nomination, sweeping three primaries in Wisconsin, Maryland and Washington, DC, and urged his party to shift focus to the general election showdown with President Barack Obama.

Newt Gingrich has laid off a number of staff members in a last-ditch effort to take his presidential campaign to the Republican convention.

Rick Santorum attacked rival Mitt Romney calling him “the worst Republican in the country to put up against Barack Obama” even as it appears the former Massachusetts governor is on course to clinch the Republican party’s nomination.

Mitt Romney easily won the Republican presidential primary in Illinois, increasing his already-formidable lead over chief rival Rick Santorum with another victory in a key industrial state.

The heartland state of Illinois is the next test today in the Republican party’s presidential nominating contest and one that would seem tailor-made for moderate front-runner Mitt Romney.

Rick Santorum has lambasted Mitt Romney, calling him a flawed candidate and asking for a one-on-one debate with the former Massachusetts governor.

Rick Santorum won crucial primaries in Alabama and Mississippi in the race for the Republican presidential nomination, dealing a devastating blow to Newt Gingrich and securing his position as the chief conservative alternative to front-runner Mitt Romney.

Mitt Romney is hoping for a breakout victory in primary votes in America’s conservative deep South, looking for a win in Alabama or Mississippi that would accelerate his campaign for the Republican nomination.

Republican candidates battled hard ahead of today’s key deep South votes as a poll said front-runner Mitt Romney would beat Democrat President Barack Obama if elections were held right now.

The leading Republican presidential hopefuls focused their campaigns on the Deep South, with polls showing a tight three-way contest in tomorrow’s pivotal primaries in Alabama and Mississippi.

Newt Gingrich says Mitt Romney is the weakest government opposition party front-runner since 1920, but his sizeable campaign fund allows him to run well in races where his rivals don’t have the resources to campaign.

Rick Santorum overwhelmingly won the Kansas presidential caucuses, hoping to blunt front-runner Mitt Romney’s momentum in the grinding campaign for the nomination to oppose President Barack Obama in the November election.

Urging conservatives not to yield, Rick Santorum is telling supporters in Mississippi that they could make the Republican presidential contest a two-man race if they deliver him a victory next week.

Mitt Romney reached out to conservatives suspicious of him and sought to assert himself as the inevitable Republican US presidential nominee, despite failing to deliver a knockout blow to his rivals in the biggest round of nominating contests.

Mitt Romney has added the Alaska caucuses after he squeezed out a win in the pivotal Ohio primary and captured four other states in the race for the Republican presidential nomination.

Mitt Romney has squeezed out a win in the pivotal Ohio primary after capturing four other states and padding his delegate lead in the race for the Republican presidential nomination.

Republican presidential hopefuls are preparing for the crucial Super Tuesday primary and caucus votes in 10 US states.

Today is the single biggest day of the Republican presidential campaign — or, as Newt Gingrich’s political action committee put it last night, the event that could represent “life or death to America as we know and love it”.

A Washington state victory in hand, Mitt Romney is looking ahead to tomorrow’s 10-state bonanza that features contests from Alaska to Ohio to Massachusetts, millions in campaign spending and the largest single day of voting yet in the Republicans’ topsy-turvy primary race.

Mitt Romney scored a hard-fought triumph in his native state of Michigan and powered to victory in Arizona today, dealing a blow to his chief rival and gaining precious momentum in the turbulent Republican presidential race.

Mitt Romney accused rival Rick Santorum of dirty tricks, for encouraging Democrats to defeat him in Michigan’s primary as voters determined his fate in his home state.

Regardless of the outcome of Republican presidential primaries in Michigan and Arizona today, Mitt Romney and Rick Santorum appear set for a showdown next week in Ohio.

Republican presidential hopeful Rick Santorum said Sunday that he does not believe in the separation of Church and state, adding that he was sickened by John F Kennedy’s assurances to Baptist ministers 52 years ago that he would not impose his Catholic faith on them.

Republicans raised and spent money for the presidential race at a frenetic pace in January, according to financial disclosures that also show why Democrats are concerned about the flagging Super PAC that supports President Barack Obama.

On Feb 6 it all seemed so clear. Mitt Romney had won landslides in Florida and Nevada and looked set to soon lock up the Republican presidential nomination to take on Barack Obama in November.

Mitt Romney eked out a narrow win in Maine’s Republican caucuses, state party officials announced, providing his campaign for the party’s presidential nomination a much-needed boost after three straight losses earlier this week.

Rick Santorum looked to build on his surprising victories in three Republican contests and establish himself as a serious rival to Mitt Romney for his party’s nomination to run against President Barack Obama.

Republican presidential contender Rick Santorum claimed the momentum a day after his shocking sweep of nominating contests in Colorado, Minnesota and Missouri that dealt a blow to front-runner Mitt Romney.

The Obama administration last night signalled it is willing to compromise over birth control measures following a furious reaction from Catholic leaders that could damage BarackObama’s re-election bid.

President Barack Obama would win in a match-up against the two leading Republican presidential candidates Mitt Romney and Newt Gingrich, a new poll shows.

Republican frontrunner Mitt Romney cruised to an easy victory in Nevada on Saturday, crushing his three remaining rivals and taking firm command of the party’s volatile presidential nominating race.

As more Republicans back him, Mitt Romney seems increasingly likely to be the party’s presidential nominee,writes Beth Fouhy

Republican presidential front-runner Mitt Romney cruised to victory in the Nevada caucuses today, notching a second straight triumph over a field of rivals suddenly struggling to keep pace.

Mitt Romney has won the Florida Republican presidential primary, early results showed today.