Republican Tim Bee, who challenging freshman Rep. Gabrielle Giffords (D-Ariz.) this fall, has lost the support of former congressman Jim Kolbe, reports the Sierra Vista Herald.

Kolbe, who served for six terms and chose not to run for re-election in 2006, hasn't said why he ended his backing for Bee, but the newspaper noted that Kolbe is openly gay and that Bee cast the deciding state senate vote in favor of putting a same-sex marriage ban on the November ballot.

Swing State Project's James L. wrote that Kolbe likely isn't pleased that the ban will again go to voters, who had defeated the same measure in 2006 51 percent to 49 percent.