From NBC's Mark Murray and Domenico Montanaro
Earlier this year, Democrats benefited from a party switch when Arlen Specter defected from the Republican Party, giving Dems (eventually) 60 votes in the Senate.
Now, as the year ends, Republicans are benefitting from a party switch of their own. First Read has confirmed a Politico report that Alabama freshman Rep. Parker Griffith (D) is switching to the GOP.
Before the defection, Democratas held a 258-177 majority in the House, so this move would reduce that advantage by one seat.
This congressional seat is a conservative-leaning one. John McCain won Griffith's district in last year's presidential election, 61%-38%; Griffith won it narrowly, 51%-48%.