Some televangelists out there are Robert Schuller, Kenneth Copeland, and Jerry Falwell. Jim and Tammy Faye Bakker were televangelists who were married to each other, but had a rather questionable reputation. Billy Graham is one of the most beloved and respected televangelists.

It is believed that Ernest Angley, born in 1921, is one of the oldest living televangelists. However, due to the varying definitions of who qualifies as a televangelist and the difficulty in verifying ages, there may be older televangelists who are less publicly known.

Some became active in politics. (Apex)

I think that is what some 'televangelists' already do. Look at some of their shows to see how it is done.

They have the same rights as anyone else but are subject to greater responsibility because of the laws affecting broadcasting and publication of ideas.