Sen. John BoozmanJohn Nichols Boozman13 GOP senators ask administration to pause separation of immigrant families Overnight Defense: Top general defends Afghan war progress | VA shuffles leadership | Pacific Command gets new leader, name | Pentagon sued over HIV policy Senate panel unanimously approves water infrastructure bill MORE (R-Ark.) returned to work in Washington Monday after having emergency heart surgery in April.

He tweeted about his return on Monday.

Boozman, 63, underwent emergency heart surgery on April 22 to correct an acute aortic dissection. Former U.S. diplomat Richard Holbrooke died from the same condition.

Boozman had been suffering from chest and shoulder pain and was checked into a hospital in Rogers, Ark.

He was elected to the Senate in 2010 after serving 10 years in the House. Before his congressional career, he worked as an optometrist.