Sen. Hillary Rodham Clinton (D-N.Y.) is back in the Senate Tuesday. Clinton will attend votes and the Senate Democrats caucus lunch, her office says.

This is Clinton's first appearance back in the Senate after ending her presidential bid and endorsing Barack ObamaBarack ObamaMellman: Rating the presidents Webb: The future of conservatism Moulitsas: Trump’s warped sense of reality MORE. Clinton will make her first joint campaign appearance with Obama Friday in Unity, New Hampshire.