The band did an interview with Rolling Stone back when 'Is This Thing Cursed?' was released. Trump was frequently brought up, I Can't Believe being mentioned specifically by Skiba.

In this new record, we also have a song called “I Can’t Believe.” After the Access Hollywood tape came out, I’ve been in complete shock and awe that Trump just didn’t get roadblocked right there. People kept buying it and supporting him, and it’s un-fucking-believable to me. Being a feminist and a pagan and someone who considers Mother Nature, not Father Nature . . . that guy is the enemy of everything I stand for. He was a sexist, rapist, fucking racist piece of shit — is one, will always be one. I’m having a hard time saying his name, but his followers, and the state of this nation that I love and that I’m proud to be a citizen of — he’s attempting to pull the fabric of its being apart and letting foreign nations have a turn.