Its the perfect setting for the kind of campy, twisty, backstabbing-filled stories the show loves to tell.
After Cathys big play in the previous episode, things arent looking good for Frank.
With support for everyone but Frank gaining, the president needs to make a move.

Credit: Netflix
His recent meeting with Conway and the threat of ICO presents the perfect opportunity.
Of course, Cathy isnt going to just sit back and let her potential nomination slip away.
That means that Frank needs to move quick, but Claire is starting to back down.
Back at home, with Yates in tow, she sees her mother quickly succumbing to her illness.
As her home nurse says, its only a matter of weeks before she dies.
The whole thing exhausts Claire, so she proposes letting Cathy get her way to Frank.
Frank isnt having any of that though.
Its sweet, in that creepy, sinister Underwood kind of way.
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Still, Frank doesnt seem to get much done with ICO.
He hears out a few options and then asks for more time to consider them.
Really, he just wants to get back at Cathy, and he gets just the leverage he needs.
Its an emotional moment, but Claire has to turn back to politics immediately.
With the death of Claires mother bolstering Franks plan, he gets aggressive with Cathy.
He gets her alone in the Oval Office and just completely goes off.
He starts telling her about his hallucinations before admitting that he had Peter Russo and Zoe Barnes killed.
Its vicious, sinister stuff that we havent seen from Frank in some time.
That support leads to Claire and Frank making up the Democratic ticket in the 2016 election.
Claire gives a stirring speech and the two take the stage to bask in yet another achievement.
But how long can the momentum last?
There are threats all around the Underwoods.
Doug is losing his grip, staring at bottle of alcohol and lashing out at bathroom doors.
And then theres Tom, whos really starting to put thing together.
She gives him one: Remy Danton.
Could disillusioned, blackmailed Remy be the one to help Tom take down the Underwoods?
How will Dunbar play a role in Toms investigation?
And will Yates affair with Claire become an issue later on?
With only three episodes left in the season, answers are surely on the way.