Sen. Ted Cruz, R-Texas, apologized Wednesday after making a joke about Joe Biden while the vice president was mourning the death of his son. Charles Dharapak/Associated Press hide caption

itoggle caption Charles Dharapak/Associated Press

Former Florida Gov. Jeb Bush had a tough week with his changing positions on the Iraq War and trying to explain whether he would have authorized it, knowing what we know now. Ross D. Franklin/AP hide caption

itoggle caption Ross D. Franklin/AP

Former President Bill Clinton campaigns before the 2014 elections for former Sen. Mark Pryor, center, and Mike Ross, right, the Democratic candidate for governor. Justin Sullivan/Getty Images hide caption

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When Mike Huckabee was governor of Arkansas, he tied a yellow ribbon around a bust of President Clinton at the Governor's Mansion. He said he would remove the ribbon when the federal government allows ARKids First to continue enrolling Medicaid-eligible applicants into the program. Chris Johnson/AP hide caption

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Former Arkansas Gov. Mike Huckabee was a Republican presidential hopeful in the 2008 election. He writes that he wants his book God, Guns, Grits, and Gravy to introduce Americans to life in "flyover country." Justin Sullivan/AFP/Getty Images hide caption

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Former Arkansas Gov. Mike Huckabee speaks at the Republican National Convention Wednesday. Scott Olson/Getty Images hide caption

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Sen. Bill Frist (left) gives a mock smallpox vaccine during a training session in 2003. Frist, a surgeon, once gave CPR to a visitor who collapsed in a Senate office building. Susan Walsh/AP hide caption

itoggle caption Susan Walsh/AP