Rep. Chris Van Hollen has agreed to play the part of GOP vice presidential candidate Paul RyanPaul RyanVA chief 'deeply' regrets if Disney comment offended vets Reid defends embattled VA secretary House panel advances transpo bill with trucking riders MORE in debate prep, according to an Obama campaign official.
Van Hollen's stand-in role is fitting — the Maryland Democrat serves as the ranking member on the House Budget Committee. Rep. Ryan (R-Wis.) is the chairman of that panel.
Sen. John KerryJohn KerryEven in defeat, Trump could harm the country irreparably Obama tells Vietnam: Human rights are 'no threat to stability' Global Magnitsky's power to protect MORE (D-Mass.) will be playing the part of Romney in President Obama's debate practice.