Freshman Rep. Parker Griffith (D-Ala.) announced Tuesday afternoon he will switch to the GOP, citing the Democratic agenda as his reason.
Griffith said Democratic legislative priorities, including healthcare reform, are harmful to the country.
"I take this step because I believe our nation is at a crossroads and I can no longer align myself with a party that continues to pursue legislation that is bad for our country, hurts our economy and drives us further and further into debt," Griffith said in a statement. "Unfortunately there are those in the Democratic leadership that continue to push an agenda focused on massive new spending, tax increases, bailouts and a healthcare bill that is bad for our healthcare system."
Griffith added that he has always considered himself an "independent voice" but that the differences in the two parties are now too vast for him to remain a Democrat.
Sources tell The Hill that GOP lawmakers in the Alabama delegation, including Rep. Robert AderholtRobert Brown AderholtGroup launches first national ad campaign to celebrate America's 250th anniversary House Democrats call for paid legal representation in immigration court Mo Brooks expresses interest in running for Shelby's Senate seat MORE, began wooing Griffith several weeks ago.
House Republican Whip Eric CantorEric Ivan CantorRepublicans eager to take on Spanberger in Virginia Virginia emerging as ground zero in battle for House majority McAuliffe's loss exposes deepening Democratic rift MORE (R-Va.) welcomed Griffith to the GOP.
"When a member of Congress decides to leave a 258-seat majority to join a deep minority, it is a sure sign that the majority party has become completely disconnected from seniors, young workers and families in America," Cantor said in a statement.
Griffith occupies one of the most conservative districts held by a Democrat. He replaced Democratic Rep. Bud Cramer (Ala.) in a seat that has stayed Democratic even as the South has trended Republican in federal elections.
Despite his vulnerable district, Griffith had yet to draw a top-flight GOP challenger. Madison County Commissioner Mo BrooksMorris (Mo) Jackson BrooksJan. 6 organizers used burner phones to communicate with White House: report The Hill's Morning Report - Presented by ExxonMobil - House Democrats eye big vote on Biden measure Meadows comes under growing Jan. 6 panel spotlight MORE and businessman Les Phillip each raised modest amounts of money for the race, with Phillip self-funding a little bit.
Griffith has bucked his party on nearly all of the items at the top of its legislative agenda.
This month he voted against the Democrats' bills on financial regulatory reform and the estate tax, as well as the omnibus. He was one of four Democrats to oppose healthcare reform, climate change and the stimulus package. The others were Reps. Bobby Bright (Ala.), Walt Minnick (Idaho) and Gene Taylor (Miss.).
Griffith said in August that he would not back Nancy Pelosi (D-Calif.) for House Speaker again because she is too divisive.
"I would not vote for her. Someone that divisive and that polarizing cannot bring us together," he told the Huntsville Times. "If she doesn't like it, I've got a gift certificate to the mental health center."
The White House appeared to be caught unaware. At the end of the daily press briefing, White House Press Secretary Robert Gibbs said he did not know that Griffith was switching parties.
Matters have not always been so friendly between Griffith and the Republicans.
During the 2008 campaign, the National Republican Congressional Committee (NRCC) launched an attack on Griffith, who is a physician, accusing him of "warehousing" cancer patients and "under-dosing" them so he could boost his profits.
"Parker Griffith: Shameful conduct. He can't be trusted," concluded the ad. (The ad, which was posted by The NRCC's YouTube account is no longer available. A message says: "This video has been removed by the user.").
But Alabama Republican Party Chairman Mike Hubbard welcomed him to the GOP.
“It was a pleasant surprise when Congressman Griffith called me this morning to inform me that he is leaving the Democrats to become a Republican," Hubbard said in a statement Tuesday.
Griffith won the open 5th district by a mere 4 percent in 2008; Sen. John McCainJohn Sidney McCainGOP senators appalled by 'ridiculous' House infighting MSNBC's Nicolle Wallace, Chris Christie battle over Fox News Trump's attacks on McConnell seen as prelude to 2024 White House bid MORE (R-Ariz.) carried the district with 61 percent in the presidential election.
His announcement comes after four House Democrats in recent weeks declared they would retire without seeking higher office: Reps. Dennis Moore (Kan.), Brian Baird (Wash.), John Tanner (Tenn.) and Bart Gordon (Tenn.).
Republicans now view those four seats as pickup opportunities for the 2010 midterm elections.
Rep. Patrick McHenry (R-N.C.) welcomed Griffith to the Republican conference via Twitter on Tuesday.
"Welcome aboard!" wrote the congressman on his account.
Griffith sits on three committees: Science and Technology; Small Business; and Trasportation and Infrastructure. Griffith's defection will result in 257 Democrats and 178 Republicans in the lower chamber.
— Aaron Blake, Bob Cusack, Molly K. Hooper and Sam Youngman contributed to this post.
— This story was originally posted at 11:06 a.m.