Just finished binge-watching all three seasons. I didn't pick up on this when it first came out as the trailer didn't get me. Boy was I wrong, this is one of the best power-drama shows I've seen in a long time. I won't bother to spoiler my comments as reading back a few pages I see no-one else has. Here are my thoughts in no particular order.
Great show, great plot, great writing/directing, great characters and great cast - mostly. I do like the ruthlessness the most. The Underwoods get shit done, and woe to anyone who gets in their way. I was not surprised when Frank killed Rossi. However, I was shocked to the point of letting out a "oh" when he killed the journalist (forget her name). Yet this was perfectly in character. That shows good writing. He is a guy who isn't afraid of stepping on other people, which is realistic, and I haven't regretted any of the "casualties" with the exception of Freddy. I'd have loved to have had the POTUS's motercade come round to Freddy's shitty joint now and again or having Freddy serve up some ribs to the Russian president, but still, it was in character so I'm not that disappointed.
The first two season are excellent, and the reason why is how they start and how they end. He has to fight all the way, scheme, lie, backstab and god knows what else, but in both cases he ended up on a higher rung than before. Starting season 3 I wondered how they would emulate that. Once he declared he would not run and the Russian plot started I figured he'd maneuver his way into a war and either use that to get elected (stand by your president in a time of war type of thing) or even just declare some sort of martial law (though I don't know if that is possible, I'm not a scholar on American presidential powers). I have to agree with many here that I was a bit disappointed with some of the ending of S3. It felt a bit of a downer, and as some here say it's like a filler series, setting up for S4.
Claire is also a bit of a puzzle. Now, correct me if I'm wrong but I got the distinct impression from late in S2 (or early S3) IIRC that they had discussed a plan that revolved around him being president first, setting her up with posts so she could gain fame and experience so she could come back and get another 8 years. A very logical plan for the couple, and in character, but I remember when I heard it I wondered how they would implement that within the series. For something like that to play out they'd need god knows how many seasons, and realistically, I think this will be a 4-5 season show, 6 at most, but that's pushing it.
I therefor expect now one of the two following scenarios: a 4 season show in which Claire falls apart, spills the beans and ultimately becomes the downfall of them both. Or, failing that, through some other means they both fall at the end. The second scenario that would probably call for a 5 or maybe 6 seasons, is that Claire purposefully helps Frank fall from grace through the same type of lying, scheming and backstabbing that Frank is so good at, with the aim of getting into the White House alone (since if she did enter it 8 years later with Frank by her side she probably knows that he would still be running the show).
Personally, the way Claire has behaved I think she may be getting cold feet so the first scenario seems more likely, but she could just be fooling us all. Either way, I think that in the end it's certain that Frank will lose (he has to) either by losing the election, being imprisoned, or assassinated. The only question in my mind at the moment is, will Claire fall to or will she "win". Anyone else see this playing out, or do you think Claire's character having gone too far?