The CEO praised one of Trump's picks for an attorney overseeing internet regulation and then when asked about it, the official Proton account replied with multiple posts about how Democrats were sold out to big business and Republicans were the party of small business. Also about how J.D. Vance was the only person to want to talk to Proton about internet regulation. It's worth noting they also left out that the attorney in question lobbied for multiple big tech companies before being appointed and Proton's whole argument was "democrats are captured by big tech".

Then when further asked about it, the CEO essentially said he didn't actually know much about the situation and hadn't meant it as an endorsement despite the original posts essentially being a one-sided attack on Democrats and all praise for the current administration, including @ mentioning Donald Trump. He also kept saying "my comments from last year" when they were from December and the controversy was in Jan.

At best it seems quite naive from Proton's side to think the administration where Musk, Zuckerberg, and Cook were front row at the inauguration, and was generally funded by Musk, Thiel, Bezos and a raft of other VC folks is going to be more aggressive at regulating big tech companies and for internet privacy in general. At worst, they're trying to curry favor with/actually in favor of the current administration and don't want to admit it because a lot of their value as a business is for people who don't want the government to see their data.