Lame-duck members are also 3-4 percent less likely to vote along party lines, researchers say.
Markey urged the Department of Transportation to ban e-cigarettes on commercial flights.
GOP senators asked the GAO to study whether the government could handle the influx of child immigrants.
House Democrats' campaign arm has released ads accusing the GOP of misplaced priorities.
Democrats called for a special envoy on LGBT rights within the State Department.
Rep. Michael Burgess (R-Texas) on Monday suggested that delaying visas for people traveling from countries in West Africa dealing with the Ebola outbreak would help limit its spread to the U.S.
Thune said it would be good for the country if Republicans take control of the Senate.
Senators asked Secretary Kerry to block Venezuela from gaining a seat on the U.N. Security Council.
"For more than 70 years, Jeep Wrangler production has played an important role in the Toledo region," said Rep. Bob Latta (R-Ohio).
Rep. Bradley Byrne (R-Ala.) accused President Obama of using the military as a "budgetary bargaining chip" in a deal to avert sequestration cuts.