Thune's support could boost Romney's campaign in the leadoff caucus state in Iowa, where the former Massachusetts governor has not campaigned as aggressively as his chief rivals.
Thune will join Romney on Wednesday morning at a stop in Des Moines and participate on a tele-town hall meeting with supporters statewide in the afternoon.
"Mitt Romney has shown throughout his life in the private sector, as leader of the
"Sen. Thune has been a leading voice in the
Thune rose to prominence when he defeated the Democratic leader of the Senate,
He ruled out a national campaign in February but is sure to be among the