In a bid to swiftly deliver on one of President-elect Donald Trump’s chief campaign promises, congressional Republicans are exploring ways to begin funding a barrier on the U.S. southern border starting as soon as April.Multiple lawmakers described the plans Thursday, which would use authority under a 2006 law supported by Republicans and Democrats alike to justify spending that could eventually reach into the billions of dollars.The most satisfying part about this, is the fact that then-Senator Obama voted for the Secure Fence Act, along with Trump’s presidential opponent, Hillary Clinton!Now the question becomes, who foots the bill? Right now it looks like America will pay upfront, and Trump will find some way, in possibly two tweets or less, to have Mexico reimburse the United States.

From the beginning of this campaign, Trump pledged to “build a wall and make Mexico pay for it.” While the funding under discussion in Congress would be from U.S. taxpayer funds, it would not preclude Trump’s administration from seeking reimbursement from Mexico, as Trump himself has discussed on the campaign trail.

“I said Mexico is paying for the wall, with the full understanding that the country of Mexico will be reimbursing the United States for the full cost of such a wall, okay?” he said during an Oct. 22 speech in Gettysburg, Pa. “We’re going to have the wall. Mexico is going to pay for the wall.”

On Friday, Trump took to Twitter with the same assertion that somehow Mexico will eventually cover the costs of what he called “the Great Wall,” although Mexican officials strongly reject offering any funds. “The dishonest media does not report that any money spent on building the Great Wall (for sake of speed), will be paid back by Mexico later!” Trump tweeted.