Well Jerry Lewis was in charge of their productions and he was a Huge commie idiot. So I can see him dropping the attack on Democrats.
Martin was a Republican. When he became part of the Rat Pack, and Sinatra agreed to help Peter Lawford with Kennedy’s campaign, Martin stayed away, because he was a Nixon supporter.
Interestingly. Sinatra actually hated Lawford, but he wanted to up his own image, and thought being close to a possible President would help. It didn’t, because after Kennedy got elected his brother Robert went after Sinatra’s pals in the Mob.
IIRC, Kennedy embarrassed Sinatra, because he refused to stay at his house, after Frank had a special-built addition made for him.
I'm not sure *when* Sinatra switched parties, but he was close to Reagan.
Jerry Lewis was? I didn’t think he was since he did the MDA Labor Day telethons... Never knew that...