Republicans are willing to support a stimulus package that costs more than the $618 billion package they proposed on Feb. 1, but the White House is not willing to come down from $1.9 trillion, Republican senators said Tuesday. “We are looking at amendments but they pretty much stalled. The administration has not indicated a willingness to come down from its $1.9 trillion figure and that’s a major obstacle,” Sen. Susan Collins (R-Maine) told reporters at the U.S. Capitol in Washington. “We have indicated a willingness to come up from our $618 billion, but unfortunately the White House seems wedded to a figure that really can’t be justified given the hundreds of billions of dollars that are still in the pipeline from the December bill.” Sen. Mitt Romney (R-Utah) told reporters separately that “there’s been very little effort on the part of the White House to meet with us and to see …