Pretty based. He IS a DSA member. Huffington Post scrubbed most of his older stuff but he was writing a politics column for them back in 2005 that was pretty decent for being a late 80s hollywood star and was arguably further left than Hillary Clinton or Barack Obama was at the time due to him being against the Iraq war entirely.

This Chicago Tribune article from 2005 has some pretty decent responses from him given the year & world events back then:

On the Democrats: “The Democrats have to figure out if they stand for anything. I think they do. I just think they’re lousy communicators and horrible tacticians for the most part.”

On being attacked from the right as a Hollywood liberal: “So maybe I’m smug, and maybe the Democrats are petty. Maybe you’re right. But you’re ordering people to their deaths. How are those two things comparable?”

On parallels between politics and showbiz: “It feels like Washington is becoming more like Hollywood in these strange incestuous relationships. Even James Carville going on talking online about the White House Iraq group or giving commentary on it, and then his wife is in the White House Iraq group.”

https://www.chicagotribune.com/2005/11/25/talking-politics-and-stardom-with-john-cusack/

Bombing people who can't escape not defense - does not mean one supports Hamas means to be against murder as solution to political problem

https://x.com/johncusack/status/491843091410612224 (he was pissed about the 2014 Gaza war and has **many ** of these - this is what got him on the antisemite of the year award because he's been doing similar pro-palestine/gaza tweets to this day)

I didn’t stand up for Boeing military salute - fast enough for some maga fuck - see? don’t even have taste not to brand weapons company all over score board RT @QsSupervisor: What in the actual fuck does “tonight’s military salute” even mean ?

Tweet from 2019: https://x.com/johncusack/status/1131408977940680704

He called Obama 'worse than Bush' (John sweetie I'm not sure about this one really given Iraq & Afghanistan but yeah the drone warfare and bombing civilian weddings isn't really stacking the dice in Obamna's favor so....) in this 2015 Daily Beast interview: https://www.thedailybeast.com/john-cusack-talks-love-and-mercy-drug-trips-and-the-ways-obama-is-worse-than-bush/

Most recently though he was at the George Floyd protests marching & recording in Chicago and got pepper sprayed & beaten by the cops there.

...I'm gonna say it JOHN CUSACK YOU'RE BASED COME TO HEXBEAR I WILL FIGHT AND DIE FOR YOU