Romney back in lead with attack ad campaign

Anticipating victory in Florida’s game-changing Republican presidential primary last night, Mitt Romney looked ahead while his struggling rival Newt Gingrich vowed to fight on.

Florida is the largest nominating contest so far this year and, with double-digit leads in statewide polls, Romney seemed headed for a big boost in the state-by-state battle to decide who will face Democratic US President Barack Obama in the November election.

If Romney wins as expected, it would mark a sharp reversal of fortune for Gingrich. The former speaker of the US House of Representatives scored a shock victory over the former Massachusetts governor and private equity executive in the last primary, 10 days ago, in South Carolina.