Neither propriety nor legality could stand in the way of his re-election. This is the philosophy that has animated tyrants the world over. Ultimately, the only true campaign reform is to shrink government. Still, there is something to be said for campaign finance reform. The current system is obviously broken.
Candidates never stop raising money.
Groups and parties can spend as much as they want independently. Outsiders need to be wealthy to hope for success. However, the usual reform proposals would make a bad system worse. You can't have both. Public financing and tax-paid support for advertising, postage and travel would force voters to underwrite candidates who they oppose.