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Republican candidates - Rick Perry
As the first votes of the primary season approach, the BBC looks at the Republican candidates hoping to stand against President Barack Obama in November.
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Rick Perry entered the race in August to a burst of enthusiasm from conservative Republicans eager for an alternative on the right to Mitt Romney.
The Texas governor quickly raised considerable money and soared to the top of the polls.
But his candidacy suffered under a series of poor debate performances, including a cringe-inducing moment when he was unable to remember the name of a government department he would eliminate if elected.
Mr Perry ran on a record of job creation and fiscal discipline in Texas, and hoped to attract the support of the evangelical Christian voters who are influential in the Iowa caucuses.
He dropped out during the South Carolina primary campaign after poor showings in Iowa and New Hampshire.
The Republican candidates are all vying for the votes of members of the Republican party in the upcoming state primaries and caucuses. Follow the changes in their political fortunes with the poll tracker, which measures opinion poll support for each candidate.
Find out more about all those running for the Republican presidential nomination on our candidates' pages.
Find out more about all those running for the Republican presidential nomination on our candidates' pages.
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's stance on the issues
See where other candidates stand
Economy
Would reduce the corporate income tax rate, cut "non-security discretionary spending" by 5% and "tear down the vast edifice of regulations the Obama Administration has imposed on the economy"
Healthcare
Would repeal Barack Obama's 2010 healthcare overhaul, even though it is conceptually similar to a plan he supported in Massachusetts; would encourage individuals to purchase their own health insurance rather than rely on their employers
Immigration
Would make English the official language of the US and "turn off the magnets like tuition breaks or other breaks that draw people into this country illegally"
National security
"It's worth working with the insurgents in the country to encourage regime change in the country. And if all else fails, if after all the work we've done there's nothing else we can do besides take military action then of course you take military action. It is unacceptable for Iran to have a nuclear weapon"
Economy
Would cap federal spending at 18% of GDP, which the campaign says is the average since 1960, and replace the complicated income tax code with a 20% flat rate
Healthcare
Would repeal Barack Obama's 2010 healthcare overhaul
Immigration
Has been criticised for his support in Texas for offering children of illegal immigrants the same low university tuition rates as native-born Texans; has suggested using Predator Drones to patrol the US-Mexico border; says a fence along the entire border "does not make sense"
National security
Would deploy thousands of soldiers to the US border with Mexico
Economy
"9-9-9" plan calls for a flat 9% individual income tax, a 9% corporate income tax, and a 9% national sales tax
Healthcare
Would repeal Barack Obama's 2010 healthcare overhaul
Immigration
"We should secure the border for real, and it would be a combination of a fence, technology, as well as possibly boots on the ground for some of the more dangerous areas"
National security
"The first thing that I would do is to assist the opposition movement in Iran, that's trying to overthrow the regime"; Would deploy warships to the Persian Gulf
Economy
Would reduce corporate income tax rates; opposes increases in the US debt limit
Healthcare
Would replace Barack Obama's 2010 healthcare overhaul with a system of individual health insurance plans
Immigration
Calls for a fence along the entire US-Mexico border and will "enforce" English as the official language of the US government
National security
"We have a President who devalues the special relationship with our most trusted ally, Britain, even as he bows to kings, bends to dictators, bumbles with reset buttons, and babies radical Islamists"
Economy
Would veto any "unbalanced" budget; refuse to raise the US borrowing limit; and eliminate the income, capital gains, and estate taxes, and cut $1tr from the annual federal budget
Healthcare
Would repeal Barack Obama's 2010 healthcare overhaul; "the answer to it is turn it back over to the patient and the doctor relationship with medical savings accounts"
Immigration
Would "abolish the welfare state" to discourage illegal immigration and end automatic citizenship for everyone born in the US
National security
Openly questions his rivals' aggressive talk on Iran and calls concerns about Iran's nuclear programme "propaganda" aimed at building support for another US war
Economy
Would eliminate the current system of income tax deductions and credits and lower individual and corporate tax rates; would eliminate capital gains taxes
Healthcare
Would repeal Barack Obama's 2010 healthcare overhaul, then consult with governers on a replacement, and says "we need to do a better job in harmonizing medical records"
Immigration
Has said it would be unrealistic to deport all 12m estimated illegal aliens in the US
National security
Questions the "ill-advised counterinsurgency campaign" in Afghanistan; calls for a "sober-minded" assessment of US commitments abroad
Economy
Would make permanent Bush-era individual income tax cuts; eliminate the capital gains tax; reduce the corporate income tax rate; and establish an "optional" 15% flat income tax
Healthcare
Would repeal Barack Obama's 2010 healthcare overhaul and offer in its place tax benefits to encourage the purchase of private health insurance
Immigration
Would make English the official language of the US and favours "100% control" of the US-Mexico border
National security
Calls for "maximum covert operations" to disrupt the Iranian nuclear programme
Economy
Calls for a 0% tax on the manufacturing industry and on repatriated corporate profits earned overseas
Healthcare
Would repeal Barack Obama's 2010 healthcare overhaul and has said: "I was always for having the government out of the health care business and for a bottom-up, consumer-driven healthcare"
Immigration
Would penalise employers who hire illegal immigrants
National security
"We should be working with Israel right now to do what they did in Syria, what they did in Iraq, which is take out that nuclear capability before the next explosion we hear in Iran is a nuclear one and then the world changes"
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