Washington (CNN) The House of Representatives voted 230-195 on Tuesday to approve $4.5 billion in aid for the growing crisis at the US southern border -- a vote that followed Democratic infighting over the package and a White House veto threat.

House Democratic leaders had worked to quell a progressive rebellion and secured passage after making several updates to the measure in response to concerns within the caucus, but the White House has already said it "strongly opposes" the legislation and it is not clear whether the House and Senate will be able to reach an agreement the President will sign off on.

The Senate has a bipartisan bill that would allocate $4.59 billion for the border crisis and advanced out of the Senate Appropriations Committee on a 30-1 vote last week. But the proposal has significant differences with the House bill, adding to the uncertainty over whether a deal can be reached.

Four liberal Democratic freshmen voted against the House measure: Reps. Alexandria Ocasio-Cortez of New York, Ayanna Pressley of Massachusetts, Rashida Tlaib of Michigan and Ilhan Omar of Minnesota.

"Right now, we are not rising to the moment. Children are dying at the hands of our own government," Omar said in a statement explaining her opposition to the bill. "Thousands are being held indefinitely in cages. They're being forced to sleep on the floor, and denied basic necessities like soap and toothpaste."

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