Ben Carson speaks at a town hall in New Hampshire Wednesday. At a later event, he joked about throwing rocks at cars as a child, but "that was back in the days before" the police "would shoot you." Darren McCollester/Getty Images hide caption

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"I think there's a move that needs to be made toward accelerating what's already inevitable, which is a clean-energy transition that'll create jobs, safeguard our environment and reduce our dependence on foreign oil," Jay Faison told NPR. Courtesy ClearPath hide caption

itoggle caption Courtesy ClearPath

House Majority Leader Kevin McCarthy, R-Calif., speaks at a news conference in July, as Speaker John Boehner looks on. McCarthy announced Monday he would run to replace Boehner, who is resigning. Mark Wilson/Getty Images hide caption

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Rep. Kevin McCarthy, R-Calif., is seen on Capitol Hill shortly after being elected House majority leader in 2014. He's now the leading candidate to replace House Speaker John Boehner when he retires next month. Mark Wilson/Getty Images hide caption

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House Speaker John Boehner gets emotional and wipes his face during a news conference on Capitol Hill in which he announced he would be resigning at the end of October. Steve Helber/AP hide caption

itoggle caption Steve Helber/AP

Pressure is building within House Speaker John Boehner's conference to oust him. Boehner is likely to hold off a challenge — for now. But he could decide to call it quits at the end of this term. Susan Walsh/AP hide caption

itoggle caption Susan Walsh/AP

Benjamin Purdy, 20, wants the next president to focus on prison reform. He says jailing non-violent drug offenders is "sucking so much money out of our budget." Asma Khalid/NPR hide caption

itoggle caption Asma Khalid/NPR

Rep. Paul Gosar, R-Ariz., who is Catholic, says he will boycott Pope Francis' address to Congress this week because of the pope's progressive views on climate change. Matt York/AP hide caption

itoggle caption Matt York/AP