Attorney General Merrick Garland has a reputation as a mild-mannered institutionalist, but he’s apparently preparing to spar with Republican critics during an appearance on Capitol Hill on Tuesday. CNN has obtained Garland’s planned opening remarks in which he comes out swinging against “conspiracy theories” being peddled to suggest that the Department of Justice has been “weaponized” against former President Donald Trump. Garland will slam efforts to link the DOJ to Manhattan District Attorney Alvin Bragg’s successful criminal prosecution of Trump, and he will slam claims that “a jury verdict…