The usual talk about public funding of campaigns ignores Presidents who travel to drum up votes for themselves or others.
Public funding of campaigns – the debate
Public funding of campaigns, and the regulation of such funding, always come up before and after an election. Everyone has an opinion on who should get what from whom, how to judge that, and who judges that. But nobody talks about how much it costs the public to move and protect an incumbent President as he tours the country trolling for votes—for himself or for a member of his party.