NASHVILLE (AP) — Tea party groups in Tennessee and national conservative organizations are looking for a primary election candidate to challenge U.S. Sen. Lamar Alexander.

The Tennessee Republican is seeking a third term, but some conservatives are outraged by his vote for the immigration bill and votes to confirm some of President Barack Obama's nominees, including Supreme Court Justice Sonia Sotomayor.

The Chattanooga Times Free Press reported the groups will conduct vetting sessions in Nashville, Chattanooga, Memphis, Knoxville and Johnson City.

The Alexander campaign points to high marks from the National Rifle Association, National Right to Life and the National Federation of Independent business in claiming a conservative stance.

Nashville Tea Party President Ben Cunningham expects a candidate to oppose Alexander will announce shortly.