Frank was still trailing Heather Dunbar (Elizabeth Marvel) in the polls and he and Claire were pretty much done at the beginning of season four. After wooing Claire back with promises of support for her own political ambitions, Frank basically double-crossed her and supported her opponent. But that's OK, because in a House of Cards twist, Claire ended up becoming Frank's running mate. Before all that happened, Lucas Goodwin (Sebastian Arcelus) shot Frank and killed Meechum (Nathan Darrow) and Heather Dunbar dropped out of the race after a meeting between her and Lucas came to light. Then and Will Conway (Joel Kinnaman) came onto the scene. The season ended with Frank and Claire, united, using ICO, an Islamic terrorist group, to their benefit and rule with fear.