It took a domestic disaster such as Hurricane Katrina to burst bubble of George W Bush

Florida senator calmly handled Trump and Bush in the party’s first candidates’ debate

Plan to cut greenhouse gas emissions triggers legal challenges from states and industry

Property mogul boasts about not preparing for first debate with rival presidential candidates

The race for the White House is already in full flight, with 16 Republicans seeking to run. But can any of them win?

Presidential contender angers Republicans by claiming senator is ‘not a war hero’

Republicans remain unconvinced as Jeb Bush finally admits he is running in 2016

Former Texas governor Rick Perry becomes 10th Republican and 14th overall to declare

South Carolina senator is party’s seventh presidential candidate in fast-growing field

Ex-governor overshadowed by brother’s record as rival touts foreign policy expertise

The Democrat candidate’s commitment to immigration reform is a sign of the times

Libertarian senator casts himself as political outsider to defeat ‘Washington machine’

Kentucky senator’s libertarian streak may make him both an outlier and a target for rivals

Firebrand Texas senator and Tea Party activist first to declare in White House race

Texan is uncompromising conservative who is likely to take a position on far right of party

Conservative firebrand flaunts credentials as conviction politician despite angry protests

Scott Walker raises profile by leading likely Republican candidates in key state of Iowa

New Jersey taxpayers anxious to see how much of their governor’s trip they’re funding

A tough fight in a crowded field