In his latest campaign video, Sen. Barack ObamaBarack ObamaEx-Clinton aide: Spicer should have resigned rather than lie Zuckerberg moves spark 2020 speculation Crowd experts: Women’s march three times bigger than inauguration MORE (D-Ill.) said he wasn't deterred by the president's latest veto on Congress' demand to start withdrawing U.S. forces from Iraq.

"If the president continues to stubbornly ignore the realities in Iraq, we intend to force our colleagues in the Senate and House to take vote, after vote, after vote, after vote, after vote until we finally overcome his veto or he understands he has to change course," Obama said.