"The president informed us that he will not sign the bill that came over from the Senate last evening because of his legitimate concerns for border security," House Speaker Paul Ryan said after he and other Republicans met with the president amid a showdown over a possible shutdown.

Trump's rejection comes just one day before funding expires for key government agencies and sent lawmakers scrambling for a new compromise, although Democrats have stood firm saying they will not support a spending measure that funds Trump's wall on the US-Mexico border.