What problems do crack babies or babies that have been exposed to weed/cigarettes or liquor face later on in life?

There's a big difference between these drugs and what effect they might have. Depending on what the fetus is exposed to and in what quantities they may face major health/development problems or no problems at all (related to that) and anything in between. 

They're the ones you see behind Trump at his rallies

They tend to support crazy people like Maxine Waters, Nancy Pelois, Hillary Clinton, Omar, Tlaib, AOC etc. That or the support lunatics on the other side like the NRA, Dana Loesch, etc