The Democratic-led House passed a $4.5 billion supplemental bill for humanitarian aid and border operations, setting up tough negotiations with the Senate as lawmakers race against the clock before the holiday recess. In a nearly party-line 230-195 vote, the House approved the supplemental border package to handle a surge in Central American migrants crossing at the southern border and improve the harsh, unsanitary conditions for children held in detention centers. The passage is a victory for House Speaker Nancy Pelosi of California, who faced fierce pushback from liberal and Hispanic lawmakers that the legislation needed to include stronger protections for detained migrant children. In light of those concerns, Democratic leaders made revisions to the bill and spent two days negotiating with them to unite the caucus. "The president would love for this bill to go down today. A vote against this bill is a vote for Donald Trump and his inhumane, outside-the-circle-of-civilized attitude toward the children," Pelosi said Tuesday. President Donald Trump has threatened to veto the House bill. The only Democrats who opposed the legislation were freshman progressive Reps. Alexandria Ocasio-Cortez of New York, Ilhan Omar of Minnesota, Rashida Tlaib of Michigan and Ayanna Pressley of Massachusetts. And only three Republicans joined Democrats in supporting the bill: Reps. Will Hurd of Texas, Chris Smith of New Jersey and Brian Fitzpatrick of Pennsylvania. The revised House bill strengthens protections for unaccompanied children in the custody of U.S. Customs and Border Protection, setting certain standards for meeting water, hygiene, nutrition and sanitation needs. The bill addresses training for personnel who interact with the children as well as access to translation services. The legislation also reduces the amount of time migrant children can stay at arrival shelters to 90 days unless Congress is notified that they can't be transferred to a state-licensed facility due to lack of space.