Because that's who he is, of course.
How desperate and stupid did tRump have to be to need the questions in advance on a ridiculous Fox-Not-The-News pretend "town hall"? If that fat orange POS couldn't get through a sycophant TV commercial from the toadies at Fox, what could he do on his own? That Dbag can barely change his own diaper.
The sad part is that some idiots think he should be president. Fvcking morons.