Ben Carson Retired physician

Age on Election Day: 65

Religion: Seventh-day Adventist

Base: Evangelicals

Résumé: Famous pediatric neurosurgeon, youngest person to head a major Johns Hopkins Hospital division. Founder of the Carson Scholars Fund, which awards scholarships to children of good character.

Education: B.A. Yale University. M.D. University of Michigan Medical School.

Family: Married to Candy Carson (1975), with three adult sons. The Carsons live in Maryland with Ben's elderly mother Sonya, who was a seminal influence on his life and development.

Claim to fame: Carson spoke at a National Prayer Breakfast in 2013, railing against political correctness and condemned Obamacare – with President Obama sitting just a few feet away.

Achilles heel: Carson is inflexibly conservative, opposing gay marriage and once saying gay attachments formed in prison provided evidence that sexual orientation is a choice.





Ted Cruz Texas senator

Age on Election Day: 45

Religion: Southern Baptist

Base: Tea partiers

Résumé:U.S. senator. Former Texas solicitor general. Former U.S. Supreme Court clerk. Former associate deputy attorney general under President George W. Bush.

Education: B.A. Princeton University. J.D. Harvard Law School.

Family: Married to Heidi Nelson Cruz (2001), with two young daughters. His father is a preacher and he has two half-sisters.

Claim to fame: Cruz spoke on the Senate floor for more than 21 hours in September 2013 to protest the inclusion of funding for Obamacare in a federal budget bill. (The bill moved forward as written.) He has called for the complete repeal of the medical insurance overhaul law, and also for a dismantling of the Internal Revenue Service. Cruz is also outspoken about border security.

Achilles heel: Cruz's father Rafael, a Texas preacher, is a tea party firebrand who has said gay marriage is a government conspiracy and called President Barack Obama a Marxist who should 'go back to Kenya.' Cruz himself also has a reputation as a take-no-prisoners Christian evangelical, which might play well in South Carolina but won't win him points in the other early primary states and could cost him momentum if he should be the GOP's presidential nominee.





Jim Gilmore Former Virginia governor

Age on Election Day: 67

Religion: United Methodist

Base: Conservatives

Résumé: Former governor and attorney general of Virginia. Former chairman of the Republican National Committee. Former U.S. Army intelligence agent. President and CEO of the Free Congress Foundation. Board member of the National Rifle Association

Education: B.A. University of Virginia.

Family: Married to Roxane Gatling Gilmore (1977), with two adult children. Mrs. GIlmore is a survivor of Hodgkin's lymphoma

Claim to fame: Gilmore presided over Virginia when the 9/11 terrorists struck in 1991, guiding the state through a difficult economic downturn after one of the hijacked airliners crashed into the Pentagon. He is nest known in Virginia for eliminating most of a much-maligned personal property tax on automobiles, working with a Democratic-controlled state legislature to get it passed and enacted.

Achilles heel: Gilmore is the only GOP or Democratic candidate for president who has been the chairman of his political party, giving him a rap as an 'establishment' candidate. A social-conservative crusader, he is loathed by the left for championing the state law that established 24-hour waiting periods for abortions. Gilmore also has a reputation as an indecisive campaigner, having dropped out of the 2008 presidential race in July 2007.





John Kasich Ohio governor

Age on Election Day: 64

Religion: Anglican

Base: Centrists

Résumé: Governor of Ohio. Former chairman of the U.S. House Budget Committee. Former Ohio congressman. Former Ohio state senator.

Education: B.A. The Ohio State University.

Family: Married to Karen Waldbillig (1997). Divorced from Mary Lee Griffith (1975-1980).

Claim to fame: Kasich was Ohio youngest-ever member of the state legislature at age 25. He's known for a compassionate and working-class sensibility that appeals to both ends of the political spectrum. In the 1990s when Newt Gingrich led a Republican revolution that took over Congress, Kasich became the chairman of the House Budget Committee – a position for a wonk's wonk who understands the nuanced intricacies of how government runs.

Achilles heel: Some of Kasich's political positions rankle conservatives, including his choice to expand Ohio's Medicare system under the Obamacare law, and his support for the much-derided 'Common Core' education standards program.





Marco Rubio Florida senator

Age on Election Day: 45

Religion: Catholic

Base: Conservatives

Résumé: US senator, former speaker of the Florida House of Representatives, former city commissioner of West Miami

Education: B.A. University of Florida. J.D. University of Miami School of Law.

Family: Married to Jeanette Dousdebes (1998), with two sons and two daughters. Jeanette is a former Miami Dolphins cheerleader who posed for the squad’s first swimsuit calendar.

Claim to fame: Rubio's personal story as the son of Cuban emigres is a powerful narrative, and helped him win his Senate seat in 2010 against a well-funded governor whom he initially trailed by 20 points.

Achilles heel: Rubio was part of a bipartisan 'gang of eight' senators who crafted an Obama-approved immigration reform bill in 2013 which never became law – a move that angered conservative Republicans. And he was criticized in 2011 for publicly telling a version of his parents' flight from Cuba that turned out to appear embellished.





Donald Trump Real estate developer

Age on Election Day: 70

Religion: Presbyterian

Base: Conservatives

Résumé: Chairman of The Trump Organization. Fixture on the Forbes 400 list of the world's richest people. Star of 'Celebrity Apprentice.'

Education: B.Sci. Wharton School of the University of Pennsylvania

Family: Married to Melania Trump (2005). Divorced from Ivana Zelníčková (1977-92) and Marla Maples(1993–99). Five grown children. Trump's father Fred Trump amassed a $400 million fortune developing real estate.

Claim to fame: Trump's niche in the 2016 campaign stems from his celebrity as a reality-show host and his enormous wealth – more than $10 billion, according to Trump. Because he can self-fund an entire presidential campaign, he is seen as less beholden to donors than other candidates. He has grabbed the attention of reporters and commentators by unapologetically staking out controversial positions and refusing to budge in the face of criticism.