It does mean he will behave dictatorially, and make dictatorial decisions as president as far as the system will allow. Previous experience (his last presidency) shows he will take every opportunity, and has a lot of leeway in your "democratic" system.

Surprisingly it doesn’t take a lot more when the political opponents don’t do shit (Biden x Garland, anyone?) or when the people either actively supports dictature or decides not to vote for… reasons.