"Anybody can talk. I've delivered," Bush says in the spot.
Companies are hoping to get their share of digital ad dollars.
The ad blitz comes as Biden mulls a run and Sanders gains in some polls.
It's part of a $7 million ad buy in Iowa.
Julian Hattem 04/30/15 01:54 PM EDT
Nancy Pelosi and others are pushing for new campaign finance regulations.
The ads targeting Christian voters air in four early-voting states on the Fox News Channel.
The Senate Conservatives Fund raised more than $90,000 for three targeted House Republicans.
The American Action Network is hitting conservatives; Club for Growth is fighting back.
The ads will be released in two battleground states.
Julian Hattem 12/19/14 09:37 AM EST
The agency wants campaigns to post more ad spending data online.