Did I tell you I'm a Republican, and I'm unfaithful to my husband?
How does your political preference relate to your behavior?
I often lie to him about what I am doing
It's your choice to be a Republican, but no matter what you are doing, it's wrong to lie to your husband about it.  Even if you are just going to political rallies, your husband might think you are cheating, and he would be justifiably angry with you.
I blame President Trump. He's my role model.
President Trump is not the best person to model relationship behavior -- you need to take responsibility for your behavior. Do you want to stay married or cheat? Doing both won't work in the long run.