1. USA Politics Democratic Party US presidential elections 2016: Long list of Republican candidates BipAmerica.com

2. USA Politics Donald Trump Bombastic real estate mogul and reality TV star drew fire for racially inflammatory remarks about Mexicans, but is surging in recent polls BipAmerica.com

3. USA Politics JebBush Former Florida governor is the son and brother of past presidents and enjoys frontrunner status due to the best name recognition and fundraising resources in the party BipAmerica.com

4. USA Politics Scott Walker Wisconsin governor is leading in the Iowa caucus polls and, perhaps more than any other candidate, appeals to both Christian conservatives and Wall Street bankers BipAmerica.com

5. USA Politics Marco Rubio Florida senator is a favourite of the party's defence hawks, but his advocacy for immigration reform turned his Tea Party backers against him BipAmerica.com

6. USA Politics Mike Huckabee Baptist preacher and former governor of Arkansas finished second to John McCain in 2008 and is a favourite of conservative evangelicals BipAmerica.com

7. USA Politics Rand Paul Libertarian senator from Kentucky is a favourite of the party's wealthy financiers and appeals to many younger voters, a demographic that has eluded the GOP in recent elections BipAmerica.com

8. USA Politics Ben Carson Only African American running is a famous doctor, but a political neophyte who is building his campaign around appeal to conservative Christians BipAmerica.com

9. USA Politics Ted Cruz Senator from Texas is a Tea Party darling, but loathed by Republican leaders for his role in shutting down the federal government in 2013 BipAmerica.com

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