Enemy Number 1 is Democrats (natch). Led by Hillary, they hope they can win in November. Many of them detest Republicans on general principles, kinda like how cats feel about dogs. It's not ideology or philosophy, it's just plain hatred.
Enemy Number 2 is the MSM. Everybody in the MSM, reporters, editors, anchorpersons, janitors are Democrats. Only being in the MSM they have a really really loud megaphone to broadcast their propaganda.
Enemy Number 3 is the business establishment. They have a cozy thing going with Hillary, they have contributed to the Clinton Foundation (paid their bribes). They need favorable regulatory rulings, tax breaks, tariffs, and other crony capitalism things. They are pretty sure that Hillary will do this stuff for them, as long as they keep paying her. They have no idea what The Donald will do if elected. That's scary.
Enemy Number 4 is the RINOs. Once elected, the RINOs find they like the Democratic tax and spend policies, especially when it results in spending in their districts. They don't care about tax hikes, they figure they can blame them on the Democrats. The MSM won't call them on it, and the voters won't fact check them either.
Enemy Number 5 is all the women in the country. The Donald is a boor, they know it, and that tape last Friday confirmed it. Plus any woman has gotta like the idea of a female president.
Enemy Number 6 is academia. Every college prof, every grade school teacher, and every administrator is a democrat. They consider it their plain duty to brainwash their students, your children, with leftist drivel. You wonder why the "millennials" are so pro Hillary and anti Trump? They are coming off of 16 straight years of leftist indoctrination.
Good luck Donald. You need all possible luck.