It's not thinking at all, really. It's feeling. They don't know the difference. They feel like Trump should, or will, do something. So that makes it true for them.
The "participation trophies are bad" crowd have embraced the idea that all opinions are equally valid rather than judged on merit. So they get to live in a world where they can shape reality on vibes. They have no use for critical thought.
When they say "I think..." what we should hear is "I wish."