They keep winning Presidential elections against the popular will, they gerrymandered districts and restricted voting to guarantee themselves electoral wins, and they stuffed the Supreme Court with extremists who will do their bidding for decades. They're pretty competent at being obstructive and gaming the system for far-right minority rule.
They're totally incompetent at many things, such as governing, but they're brilliant at brainwashing their followers and causing harm to people at home and around the world. Just like typical fictional supervillains.