"Congress clearly expressed its will not to spend more than $1.3 billion and to restrict how much of that money could go to barriers. Therefore, President Trump’s emergency order is clearly in opposition to the will of Congress," Paul wrote in the op-ed on Sunday. "Congress clearly expressed its will not to spend more than $1.3 billion and to restrict how much of that money could go to barriers. Therefore, President Trump’s emergency order is clearly in opposition to the will of Congress," Paul wrote in the op-ed on Sunday. Paul's op-ed comes Paul's op-ed comes after he told Republicans in Kentucky at a dinner on Saturday night that he could not "vote to give the president the power to spend money that hasn’t been appropriated by Congress."

But Paul appears to go a step further in the Sunday op-ed, specifically saying he will support the resolution of disapproval when it comes on the Senate floor in a matter of days and outlining his reasons for supporting it.

Trump declared a national emergency after Congress passed legislation giving him $1.375 billion for physical barriers along the border, less than the $5.7 billion he requested."Every single Republican I know decried President Obama’s use of executive power to legislate. We were right then. But the only way to be an honest officeholder is to stand up for the same principles no matter who is in power," Paul writes in the op-ed.