Senate Majority Leader Harry Reid, D-Nev., is backing President Barack Obama’s renewed push for authority to train and equip Syrian rebels as part of his plan to take on the Islamic State, as the president himself is lobbying lawmakers to act before heading home.

Reid also said he believes Obama otherwise already has the authority he needs to take on ISIS, and questioned a push for a new authorization to use military force.

“We should be learning from our past mistakes, not repeating them,” Reid said, referring to the invasion of Iraq.