Missouri Senator Roy Blunt broke with President Trump Thursday and voted to block his use of emergency powers to secure the border.

Blunt was one of 12 Republicans who joined Democrats in passing the resolution.

Trump says he’ll veto it.

Here’s what Blunt had to say about how he voted:

U.S. Senator Roy Blunt (Mo.) released the following statement after voting in favor of H.J. Res. 46, the emergency declaration resolution of disapproval:

“I fully support President Trump’s commitment to secure the border and build physical barriers wherever they are needed. I have repeatedly said that securing the border has to be the first step in addressing our immigration issues. There are several existing authorities that could be used to support what President Trump wants to do at the border without creating a court case or declaring an emergency. I have encouraged him to use those authorities.

“This issue will be settled in the courts. That could take months and result in future Presidents having emergency authority to use in other ways. Democrats have already made clear that they believe they could use this same authority to impose policies like gun control or the Green New Deal. Those decisions should not be made without congressional action. I was aggressively opposed to the Obama administration’s attempts to circumvent Congress’s appropriating authority to prop up Obamacare. The same principle should apply regardless of which party occupies the White House.”