Conservative fundraising group American Crossroads is filling in for Republican U.S. Senate hopeful Joni Ernst while she participates in Iowa National Guard training for two weeks.
Group spokesman Paul Lindsay told The Associated Press on Monday that the group backed by GOP strategist Karl Rove is spending $415,000 on a 30-second television ad that begins airing statewide Tuesday. That's in addition to the $3.1 million in advertising time the group has reserved in Iowa as part of the $20-million blitz the group plans in Senate battleground states.
Ernst herself ran the most memorable ad of the year so far:
