in fact, in hollywood these days it s more like six degrees of mayor pete. another favorite among the celebrity set, their home-state senator kamala harris who scored donations from sean penn, don h chetal and jennifer garner. this is how it s going to be. reporter: america s sweetheart tom hanks wrote a check to former vice president joe biden s campaign. he could also offer the former v.p. some advice on debate prep. never know what you re going to get. reporter: one complication, in this 2020 election cycle, cashing big checks from millionaires could become problematic. you become kind of a favored candidate of the elite. we re trying to reach everybody at every different level. reporter: massachusetts senator elizabeth warren has sworn off, quote, fancy receptions or big-money fund-raisers. i am not doing fund-raisers with multimillionaires. reporter: but hollywood just can t seem to quit her. warren still found support from