(WASHINGTONTIMES) — When Mitt Romney taps Rep. Paul Ryan to be his running mate on Saturday, he is picking someone who has already tangled toe-to-toe with President Obama on several occasions, and is prepared for the bruising battle ahead.

Indeed, Mr. Obama has built up plenty of bad blood with Mr. Ryan, calling him the architect of “social Darwinism” earlier this year, stemming from the Wisconsin Republican’s budget plan.

Last year, liberal activists produced a campaign video equating Mr. Ryan’s budget plans to pushing an old lady in a wheelchair off a cliff. And Mr. Obama pointedly blasted Mr. Ryan in a closed-door meeting with donors in Chicago, saying he’s “the same guy that voted for two wars that were unpaid for, voted for the Bush tax cuts that were unpaid for, voted for the prescription drug bill that cost as much as my health care bill — but wasn’t paid for. So it’s not on the level. And we’ve got to keep on, you know, keep on shining a light on that.”

But Mr. Ryan has shown he’s not shy about firing back at the president, bringing both budget numbers and sharp rhetoric to the fight.

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