Morning Edition host Steve Inskeep interviews President Obama on Dec. 17 in the Oval Office, where they discussed recent moves on Cuba and immigration, and prospects for cooperation with a GOP-dominated Congress. Kainaz Amaria/NPR hide caption

itoggle caption Kainaz Amaria/NPR

President Obama stumped for gubernatorial candidate Tom Wolf this weekend in Philadelphia. Wolf's victory Tuesday was among the few bright spots for Democrats. Pablo Martinez Monsivais/AP hide caption

itoggle caption Pablo Martinez Monsivais/AP

Early results showed more than a 2-1 lead for a measure to make recreational marijuana use legal in Washington, D.C. A sign promoting the initiative is seen on a corner in the Adams Morgan neighborhood Tuesday. Allison Shelley/Getty Images hide caption

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Supporters of Republican Sen.-elect Tom Cotton celebrate his win in Arkansas over incumbent Mark Pryor. The GOP picked up seven seats Tuesday, gaining control of the Senate. Justin Sullivan/Getty Images hide caption

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Former Secretary of State Hillary Clinton campaigned for Maryland Democratic gubernatorial candidate Anthony Brown (right) in October. President Obama and Michelle Obama have also campaigned in the state. This level of Democratic star power so late in the race is unusual in a reliably blue state. Patrick Semansky/AP hide caption

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Florida Democratic gubernatorial candidate Charlie Crist, center, gets a kiss from a supporter after he stepped off his bus during a brief campaign stop at Delevoe Park in Fort Lauderdale, Fla., on Oct. 25. Wilfredo Lee/AP hide caption

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Laney Barroll Stark, of Savannah, Ga., took a picture with her cell phone as Rep. Jack Kingston, who ran for the Republican nomination for U.S. Senate in Georgia, addressed supporters at his primary runoff election night party in July. David Goldman/AP hide caption

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It's a long shot, but there's a scenario where control of the Senate might not be known until Jan. 6 — three days after the start of the next Congress. That's when Republican David Perdue and Democrat Michelle Nunn will face each other in a Georgia runoff if one of them fails to win 50 percent on Tuesday. David Tulis/AP hide caption

itoggle caption David Tulis/AP

Texas lieutenant governor hopefuls state Sen. Dan Patrick and state Sen. Leticia Van de Putte shake hands following a September debate. While most eyes are on the governor's race, this contest could have even more political consequence. Eric Gay/AP hide caption

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