Could make a political action committee to get commercials aired in Congressional races against incumbents. I see four that are easy.

Nancy Pelosi
Steny Hoyer
David Price
Lindsey Graham

They have a litany of mistakes and attack ads work best we they are truthful and come from a third party source
(Just put forth their records and statements)

Have commercials and newspaper ads that highlight their records and statements and then say Throw This Bum Out!