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

itoggle caption Justin Sullivan/Getty Images

Former Secretary of State Hillary Clinton speaks at the Clinton foundation's Clinton Global Initiative conference with her husband, Bill, and daughter, Chelsea, looking on. Michael Loccisano/Getty Images hide caption

itoggle caption Michael Loccisano/Getty Images

Chelsea Clinton, vice chair of the Clinton Foundation, walks on stage Sept. 23 while moderating the panel discussion "Valuing What Matters" during the Clinton Global Initiative in New York. She gave birth to a baby girl, her first child, three days later. Mark Lennihan/AP hide caption

itoggle caption Mark Lennihan/AP