When you co-sign Trump as Christian, you say his actions, values, and heart are reflective of Christ! You are co-signing his sinful ways as being godly ways, and will also be responsible for those who are being led astray and those who use these values to prop up their sin!
Listen, we are talking about two world leaders, one political and the other religious! It would be dangerous enough if these two men simply had local poilitical/religious associations and influences, but they are not simply local. They are positionally set up on the WORLD stage. to affect GLOBAL policies and how Christianity is viewed, measured and evaluated.
These are not the ways of Christ! Therefore, your salvation is in high doubt.