I agree with nocall. If you want to give money to ANY candidate, do it through that candidate's website or by calling their campaign headquarters. If you get a call asking for a donation to a particular candidate, and you like that candidate and want to support him or her, politely tell the caller that you will make your donation online. If they persist and get pushy, hang up. Better yet, don't answer calls from numbers you do not recognize.
I don't answer caller unknowns. I have donated a few times to Ted Cruz (ONLINE ONLY) I will continue to donate to Ted Cruz on my own schedule and he has my vote. but not because of the phone solicitations. Phone/software can enable regular folks who volunteer, to telemarket for their candidate from their own homes. I have done so, but no longer do, because I used to make my living telemarketing adverts and I'm retired and would rather pound a keyboard and stare at screens in silence. Knowing how irritating solicitation calls or texts can be, it may be counter productive to telemarket candidates, but then, I guess not, or the campaigns would not do it.