As Claire begins exploring a campaign of her own, she and Frank engage in backdoor political maneuvering. But this time they're not on the same side.

Claire joins Frank as he stumps in South Carolina, but he doesn't trust her. A disastrous scandal blindsides Frank's campaign on primary day.

Claire threatens Frank. Frank makes a politically bold move that may provoke Russia. An event at a campaign stop changes everything.

Claire advises Donald Blythe on dealing with Petrov. Further investigation of Lucas Goodwin dredges up his accusations against Frank.

Claire clashes with the Secretary of State over her involvement in negotiations with Russia. Dunbar must choose between her campaign and her ethics.

Frank and Claire adjust to their new reality. The search for Frank's running mate begins. Frank starts a campaign to weaken Conway's strong support.

Formidable as ever, both Underwoods have their eyes on the big picture as they manipulate a potential running mate and push the gun bill.

At the convention, Frank and his team publicly push for Catherine Durant to be chosen as his running mate, but privately pursue a different agenda.

As Frank deals with a new threat to his candidacy, Claire has doubts about their plan. Claire faces a difficult decision concerning her mother.

Frank ups the ante on the war on terror to counter Conway's public show of strength. Tom joins Claire on the campaign trail.

Frank asks Will to help deal with extremists threatening to murder hostages. Hammerschmidt digs deeper into the allegations against Frank.

As the hostage situation continues, Claire secretly negotiates with Yusuf al Ahmadi. Frank confronts Hammerschmidt.