NORTH LITTLE ROCK, Ark. (AP) -

Former Republican presidential nominee Mitt Romney will be campaigning in Arkansas for GOP Congressman Tom Cotton in Cotton's bid to unseat Democratic U.S. Sen. Mark Pryor.

The former Massachusetts governor is scheduled to appear with Cotton at a news conference in North Little Rock.

Cotton is a freshman congressman representing south Arkansas. Pryor was first elected to the Senate in 2002 and is the only Democrat in the state's congressional delegation. The race is one of the most expensive and closely watched in the country.

Romney is among several national GOP figures visiting the state during the next week and campaigned with gubernatorial hopeful Asa Hutchinson in Jonesboro on Wednesday. New Jersey Gov. Chris Christie is set to visit the state to campaign for Hutchinson next week.