The left? Well, some who claim they are on the right aren't a whole lot better. (Note: I used the word "claim" deliberately, many of the ones I'm thinking of are RINOs.)
Difference is that the "RINOs" don't call for his impeachment. They still want him as president just don't agree with everything he is doing. No need to call them traitors. It is OK to question what our president is doing with our country regardless if we are at war or not. If you don't agree then just imagine Hillary in office.