© Greg Nash
Sen. Rand Paul
Randal (Rand) Howard PaulWe're all on the tarmac, waiting for an Iran policy This week: Congress set for clash on Trump's border request Washington braces for Trump's next move on Iran MORE (R-Ky.) predicted on Sunday that the Supreme Court will likely strike down President Trump
Donald John TrumpNew EPA rule would expand Trump officials' powers to reject FOIA requests Democratic senator introduces bill to ban gun silencers Democrats: Ex-Commerce aide said Ross asked him to examine adding census citizenship question MORE's emergency declaration, adding that the president's actions went against "the will of Congress."
Randal (Rand) Howard PaulWe're all on the tarmac, waiting for an Iran policy This week: Congress set for clash on Trump's border request Washington braces for Trump's next move on Iran MORE (R-Ky.) predicted on Sunday that the Supreme Court will likely strike down President TrumpDonald John TrumpNew EPA rule would expand Trump officials' powers to reject FOIA requests Democratic senator introduces bill to ban gun silencers Democrats: Ex-Commerce aide said Ross asked him to examine adding census citizenship question MORE's emergency declaration, adding that the president's actions went against "the will of Congress." 
Brett Michael KavanaughStephen King: 'It's time for Susan Collins to go' EXCLUSIVE — Trump: I would fill Supreme Court vacancy before 2020 election Supreme Court rules against newspaper over information request, giving confidentiality win to businesses MORE and Neil Gorsuch, Trump's Supreme Court nominees, "may rebuke him on this."ADVERTISEMENT
Trump's emergency declaration is already facing legal challenges. Trump predicted last month that the 9th U.S. Circuit Court of Appeals will block his move to declare a national emergency to build the U.S.-Mexico border wall — but that he'll win the fight at the Supreme Court.
He said at the time that he hoped the administration would "get a fair shake and we'll win in the Supreme Court, just like the [travel] ban." He added that Republicans who were supporting Trump's emergency declaration after criticizing Obama's actions "will and should be condemned for hypocrisy."
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. "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 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." "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.
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.
"I stand with the president often, and I do so with a loud voice. Today, I think he’s wrong, not on policy, but in seeking to expand the powers of the presidency beyond their constitutional limits," Paul wrote.
Paul's vote gives supporters of the resolution blocking the emergency declaration their crucial 51st vote needed to send the measure to Trump's desk, where he's warned that he will veto it.
With all 47 senators in the Democratic caucus expected to support the resolution of disapproval, they needed to flip four Republicans. In addition to Paul, Sens. Susan Collins
Susan Margaret CollinsThe Hill's Morning Report - In exclusive interview, Trump talks Biden, Iran, SCOTUS and reparations Hillicon Valley: Senate bill would force companies to disclose value of user data | Waters to hold hearing on Facebook cryptocurrency | GOP divided on election security bills | US tracking Russian, Iranian social media campaigns Stephen King: 'It's time for Susan Collins to go' MORE (R-Maine), Lisa Murkowski
Lisa Ann MurkowskiGOP lawmakers want Mulvaney sidelined in budget talks Overnight Defense: Officials brief Congress after Iran shoots down drone | Lawmakers fear 'grave situation' | Trump warns Iran | Senate votes to block Saudi arms sales | Bombshell confession at Navy SEAL's murder trial The 7 GOP senators who voted to block all or part of Trump's Saudi arms sale MORE (R-Alaska) and Thom Tillis
Thomas (Thom) Roland TillisDemocratic challenger leads Tillis by 1 point in North Carolina poll GOP frets about Trump's poll numbers Koch political arm endorses Colorado Sen. Gardner MORE (R-N.C.) are expected to vote for the resolution.
Susan Margaret CollinsThe Hill's Morning Report - In exclusive interview, Trump talks Biden, Iran, SCOTUS and reparations Hillicon Valley: Senate bill would force companies to disclose value of user data | Waters to hold hearing on Facebook cryptocurrency | GOP divided on election security bills | US tracking Russian, Iranian social media campaigns Stephen King: 'It's time for Susan Collins to go' MORE (R-Maine), Lisa MurkowskiLisa Ann MurkowskiGOP lawmakers want Mulvaney sidelined in budget talks Overnight Defense: Officials brief Congress after Iran shoots down drone | Lawmakers fear 'grave situation' | Trump warns Iran | Senate votes to block Saudi arms sales | Bombshell confession at Navy SEAL's murder trial The 7 GOP senators who voted to block all or part of Trump's Saudi arms sale MORE (R-Alaska) and Thom TillisThomas (Thom) Roland TillisDemocratic challenger leads Tillis by 1 point in North Carolina poll GOP frets about Trump's poll numbers Koch political arm endorses Colorado Sen. Gardner MORE (R-N.C.) are expected to vote for the resolution. 
