Obama's former campaign manager Jim Messina was also at the White House on Tuesday; reporters at the White House press briefing asked questions about spotting both men on campus.

"You witnessed the formation of a new band," White House press secretary Jay Carney joked, according to reports.

Bono also planned to meet with lawmakers from both sides of the aisle while visiting D.C. as a representative of the grassroots advocacy ONE Campaign this week, according to the Huffington Post.

—Photo courtesy the VP's official Twitter feed.

Updated at 3:36 p.m.