It's a weird movie for sure, and while I agree with Aggie_Journalist for the most part, I might have liked it a bit more than he did.
First off, Bale should win an Oscar for his portrayal of Cheney. His transformation is uncanny and absolutely spot-on. Echoing AJ's sentiment, the entire cast is also nails, it's just that the material isn't quite up to par. While it's all DEFINITELY a liberal hit job, it doesn't really do a good job of making it all gel. Case in point, my dad is as hardcore conservative as they come, but he actually liked the movie despite its bent. You kind of tend to understand - if not outright agree with - a decent amount of what Cheney is doing. And don't get me wrong, it paints him and the Bush administration in a terrible light, shows Cheney doing some abhorrent sh*t, and he definitely chooses power above all in the end, but you also at least understand his motivation. It's like in one moment writer/director Adam McKay seems to be blaming school shootings and even the California wild fires on Cheney in eye-rolling fashion, but then in other moments also seems to be making him a sympathetic villain if not a hero at times (even if ironically, though it doesn't quite come across as ironic as McKay maybe wants it to be).
Anyway, despite its muddled narrative, it was honestly better than I thought it'd be, given the recent wave of mixed reviews and the fact that I thought seeing it with my ultra conservative parents was going to be a bit of a disaster. It's an interesting story told in an - at times - clever way, that I think anyone can appreciate. My parents totally got all the digs and rolled with the punches, and while a lot of the digs land effectively, it's just not that effective in bringing it all home in the way McKay is aiming for. That, and it's only mildly funny at times. I think I half-chuckled maybe twice, not nearly as much as I did in The Big Short, which I loved.
All of this is a long way of saying that I wouldn't see this in the theater - unless you want to see Bale's lock of an Oscar nomination performance before the awards circuit - otherwise I'd say you're probably better off catching it on cable/streaming.
