"As a member of the House of Representatives for the last few years, I have fought tooth-and-nail against President Obama's agenda at every turn. I was the first member of Congress to call him a socialist who embraces Marxist-Leninist policies like government control of healthcare and redistribution of wealth," he writes in a letter to potential fundraisers obtained by The Atlanta Journal-Constitution.

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Broun is the only candidate who's so far announced for the seat left open by Sen. Saxby ChamblissSaxby ChamblissFormer GOP senator: Let Dems engage on healthcare bill OPINION: Left-wing politics will be the demise of the Democratic Party GOP hopefuls crowd Georgia special race MORE's (R-Ga.) decision to retire, though a number of other Georgia Republicans, including Reps. Tom Price, Jack Kingston, Phil GingreyPhil GingreyBeating the drum on healthcare Former GOP chairman joins K Street Former Rep. Gingrey lands on K Street MORE and Tom GravesTom GravesWeek ahead: House eyes trillion-dollar omnibus | Crunch time for Senate ObamaCare repeal bill | Senate moves ahead on Trump nominees House GOP looks to advance trillion-dollar omnibus House Republicans consider repeal of ObamaCare's insurance mandate MORE, are also considering a bid.

The hardline conservative congressman has a history of making incendiary comments — just a few weeks ago he said Obama followed the "Soviet Constitution" — but since he announced his bid he has used some notable restraint in his rhetoric. It seems that only goes so far.