Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE (R-Ky.) wished Chief Justice John Roberts a happy birthday on Monday as the Senate resumed President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE's impeachment trial.

“On behalf of all of us, happy birthday,” McConnell said, congratulating Roberts, who is presiding over the trial, on another year. “I’m sure this is exactly how you’d planned to celebrate the day.”

Roberts thanked McConnell for the birthday wishes and joked back, “Thank you to all the senators for not asking for the yeas and nays,” causing the Senate floor to erupt in laughter in a rare light moment during the proceedings.

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The Senate’s chaplain, Barry Black, was the first to wish the chief justice a happy birthday, ending his prayer with, “Thank you for giving our chief justice another birthday.”

The Senate began its sixth day of the impeachment trial Monday, with the president’s defense team making their arguments. The trial began last week and saw the House impeachment managers deliver the opening statement.

Roberts is obligated to preside over the trial and is able to rule on all questions of evidence under Senate impeachment rules.

The House impeached the president on charges of abuse of power and obstruction of Congress last month.