Re-election battles, looming indictments, parties, their Party... these senators need a drink. And a new housemate.

The senators adjust to their new roommate, and his girlfriend, as preparations for the Congressional Delegation to Afghanistan continue.

After a surprise explosion in Afghanistan leaves Louis recovering from an injury, Adriana makes controversial private arrangements for the group to return home.

Tempers heat up as Gil John's wife Maddie arrives to help him prepare for his upcoming debate with Digger Mancusi. Meanwhile, Louis continues to recover in the hospital and Senator Armiston leads an ethics committee investigation against Robert.

Louis continues to gain constituent support as Shelby chronicles his recovery. Gil John faces Digger Mancusi in a town hall where he struggles to keep up with his polished and well-liked opponent, despite much help and coaching from Robert and Andy.

Rosalyn organizes a prayer brunch to celebrate Louis' homecoming from the hospital, but the Senators and their fellow Democrats find it difficult to set aside their differences. Aaron and Tammy's relationship continues to grow and Lola has a surprise in store for James.

While on the campaign trail through North Carolina, Gil John blows off a meeting with the governor to visit Ruby Shoals where he becomes re-inspired about his campaign. Robert's pro-fracking visit to a constituent's home in Pennsylvania does not go as planned.

Robert proves to the ethics committee that he would never take a mohair suit while Andy prepares to deliver a rebuttal after the State of the Union. Louis is put in the spotlight on his first day back when James mistakenly tweets a photo intended for Lola from the wrong account.

Louis decides to help showgirls organize, but the Watt brothers stand in his way. A video of Gil John hitting a soldier with a chair in Afghanistan goes viral so Maddie looks for a way to humanize him and Andy's Vanity Fair cover shoot takes an unexpected direction.

When another senator dies unexpectedly, Gil John is asked to organize the funeral arrangements. Louis wins the Nevada primary but Robert has to face off in a Pennsylvania debate to cool the competition.