Press secretary Sarah Sanders, speaking to reporters on Wednesday, said the president had not yet decided whether he would support the agreement.
Trump said Tuesday he would need more time to study the plan, but he also declared he was not expecting another shutdown this weekend when funding for parts of the government would run out.
He strongly signaled he planned to scrounge up additional dollars for the wall by raiding other federal coffers to deliver on the signature promise of his presidential campaign.
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"But one way or the other, and one thing you can be sure of, is at the end of the day the president is going to build the wall, " Sanders said.