US Secretary of State Rex Tillerson has said that China has threatened to impose sanctions on North Korea if it conducts further nuclear tests.

An "unshackled" Donald Trump has stepped up his attacks on his own party leaders, promising to teach Republicans who oppose him a lesson and fight for the presidency "the way I want to".

Good afternoon. Here’s all the news you need to know this lunchtime.

Former Fox News Channel anchor, Gretchen Carlson, has sued network chief executive, Roger Ailes, claiming she refused his sexual advances and that this was why her contract was not renewed.

Donald Trump says there are thousands of people living in the United States "sick with hate" and capable of carrying out the sort of massacre that killed at least 50 people in a Florida nightclub.

Rick Santorum, the conservative former senator who won nearly a dozen contests in the 2012 race for the Republican nomination, was due to suspend his latest and long-struggling run for the presidency last night.

Obama to host Democratic candidate Sanders in Oval Office

Donald Trump has backtracked from his support for a government database to track Muslims in the US — an idea that drew sharp criticism from his Republican presidential rivals and disbelief from legal experts.

The founder of the global News Corp media empire, Rupert Murdoch, is suggesting that US president Barack Obama is not a “real black president.”

Donald Trump belittled the physical appearance of fellow Republican US presidential candidate Carly Fiorina, saying: “Look at that face. Would anyone vote for that?”

Republican presidential candidate Donald Trump has opened up a new media feud, taking on another popular TV news personality even as his appearances continue to draw big ratings.

An estimated 24 million Americans watched Fox News Channel’s prime-time debate with the top 10 Republican presidential candidates, the highest-rated broadcast in the network’s history.

The media baron Rupert Murdoch is preparing to hand over the CEO job at Twenty-First Century Fox to his son, James, the firm’s channel Fox News reported.

CBS News has released video from four stories it aired about the Falklands War in 1982, all part of a dispute involving Fox News Channel host Bill O’Reilly and his subsequent statements about covering the war.

The Sudanese woman imprisoned for refusing to reject Christianity has said she was resolved to keep her faith even if it meant death.

USA: A US TV news presenter has apologised for falsely saying that President Barack Obama had offered to pay for the operation of a museum of Muslim culture “out of his own pocket” during the government shutdown.

Syrian President Bashar Assad said a United Nations report finding “clear and convincing evidence” that sarin nerve gas was used in Syria painted an “unrealistic” account, and he denied his government orchestrated the attack.

Former Republican vice presidential candidate Sarah Palin is leaving leading US TV channel Fox News.

An estimated 65.6 million people watched President Barack Obama and Mitt Romney face off in their contentious second presidential debate.

US president Barack Obama is set to argue in the battleground state of Ohio that the tax proposals of his Republican challenger Mitt Romney would be good for China and other countries, but bad for the United States.

Under pressure to limit contagion from the British phone hacking scandal, Rupert Murdoch’s News Corp said yesterday that it is considering splitting into two publicly traded companies.

A soldier in Afghanistan learned about the death of Osama bin Laden on Facebook. A TV producer got a tip from comedian Kathy Griffin on Twitter. A blues musician received an email alert from The New York Times. And a woman found out as she scrolled through the internet on her smartphone while walking her dog.

Barack Obama said he did not take it personally when people said they hated him, but the thing he disliked most about being the US president was the constant, intense scrutiny.

European leaders have urged Egyptian authorities to protect reporters covering the country’s crisis.

PIERS MORGAN will open his new prime-time US TV show with an hour-long Oprah Winfrey interview.

Piers Morgan will open his new prime-time US TV show with an hour-long Oprah Winfrey interview.

Two presidents and four television news anchors turned out to bid iconic US TV host Larry King farewell as he pulled the curtain down on his CNN talk show after 25 years.

A US news analyst has been fired by National Public Radio after saying that he gets nervous when he sees people in Islamic clothes on a plane.

Sean Penn has visited disaster-stricken Haiti to highlight the need for more help.

White House environmental adviser Van Jones, embroiled in a controversy over past inflammatory statements, resigned after what he called a “vicious smear campaign against me”.

WORKING to turn Russia from antagonist to ally, US President Barack Obama has asked the Russian people to “forge a lasting partnership” with the US, but he acknowledged after talks with Prime Minister Vladimir Putin that on divisive issues there won’t be “a meeting of the minds anytime soon”.

SARAH PALIN says she’s not a quitter, she’s a fighter, but adds that, politically speaking, “if I die, I die. So be it.”

President Barack Obama today declared the US lost its “moral bearings” with gruesome interrogations of suspected terrorists and left the way open to possible prosecution of those who authorised them.

A national US civil rights organisation is planning protests in dozens of US cities over the New York Post cartoon that critics say likened a violent chimpanzee to President Barack Obama.

Alaska governor Sarah Palin and her unmarried teenage daughter who announced her pregnancy as her mother became the Republican vice-presidential candidate gave a frank TV interview about the issue.

George Bush said he refused to “compromise his soul” to be popular during his eight-year tenure as US president.

Global media magnate Rupert Murdoch said pessimists who predict the internet will kill off newspapers were “misguided cynics” failing to grasp that the online world is a potentially huge new market of information-hungry customers.

The first debate between John McCain and Barack Obama, seen by an estimated 52.4 million viewers, was a TV ratings flop, a US research firm said.