Mitt Romney Wins Republican Presidential Bid

As political experts assess Republican Mitt Romney's failed U.S. presidential bid, an analysis of how his campaign and President Barack Obama's winning team used cable TV to target ads at specific groups of voters may offer some valuable tips for the future.

President Barack Obama's Democrats retained their majority in the US Senate in Tuesday's election, fending off a concerted Republican bid to win back control of the chamber, US media reported.

Mitt Romney clinched the Republican presidential nomination on Tuesday with a win in the Texas primary, a triumph of endurance for a candidate who came up short four years ago and had to fight hard this year as voters flirted with a carousel of Republican rivals.

As political experts assess Republican Mitt Romney's failed U.S. presidential bid, an analysis of how his campaign and President Barack Obama's winning team used cable TV to target ads at specific groups of voters may offer some valuable tips for the future.

President Barack Obama's Democrats retained their majority in the US Senate in Tuesday's election, fending off a concerted Republican bid to win back control of the chamber, US media reported.

Mitt Romney clinched the Republican presidential nomination on Tuesday with a win in the Texas primary, a triumph of endurance for a candidate who came up short four years ago and had to fight hard this year as voters flirted with a carousel of Republican rivals.