The White House asked lawmakers Thursday for 0 million to train and equip vetted Syrian rebels, in what would be a significant escalation of US involvement in a conflict that has spilled into Iraq. Following several signals in recent weeks by President Barack Obama's administration -- and months of pressure from lawmakers like Senator John McCain -- the White House said it intends to "ramp up US support to the moderate Syrian opposition." The request is part of a $1.5 billion Regional Stabilization Initiative to bolster stability in Syrian neighbors Iraq, Jordan, Leba**n and Turkey, and to support communities hosting refugees. The proposed funding would serve "vetted elements of the Syrian armed opposition to help defend the Syrian people, stabilize areas under opposition control, facilitate the provision of essential services, counter terrorist threats and promote conditions for a negotiated settlement," the White House said in a statement. In a separate statement, National Security Council spokeswoman Caitlin Hayden said the funding "would build on the administration's longstanding efforts to empower the moderate Syrian opposition" and allow the Pentagon to increase its support to vetted armed rebels.