Thompson will make a "major announcement" about his presidential campaign Wednesday.
WASHINGTON (CNN) - Former Wisconsin Gov. Tommy Thompson is set to make a “major announcement” about the future of his campaign on a conference call Wednesday, according to his presidential campaign.
Rennick Remley, a Thompson spokesman, says presidential candidate and former Bush cabinet member will discuss whether he will participate in the Iowa Straw Poll in August. Thompson has concentrated most of his campaigning in Iowa.
Former New York City Mayor Rudy Giuliani and Arizona Sen. John McCain have already said they will not participate in the straw poll.
- CNN Associate Producer Lauren Kornreich