Conservative commentator Erick Erickson is giving "prayerful consideration" to challenging Sen. Saxby Chambliss (R-Ga.), he said on his radio show Tuesday night.

Erickson, the editor in chief of the website — a popular site with conservatives — and a CNN contributor, has been harshly critical of Chambliss, describing him in a Tuesday post as "waffling like a dog off its leash for the first time." That night, he said he'd been asked by a number of people asking him to run and while he hadn't previously considered it, would give it "prayerful consideration" with his wife. He also sent a few tweets beginning with "if I were senator" that then tweaked Chambliss on some positions.

Chambliss recently said he'd be willing to break the Americans for Tax Reform pledge he'd signed to oppose any new taxes in order to solve the debt crisis and avoid the fiscal cliff, though he later clarified that he's not in favor of tax increases. That drew the ire of conservatives and made him more vulnerable to a primary challenge from the right.

Former Georgia Secretary of State Karen Handel (R) is also reportedly mulling a run against the two-term senator.