President Trump has few bigger allies than me when it comes to supporting his vision of 21st-century border security, encompassing a major investment in technology, personnel and infrastructure, including new physical barriers where they will be effective. It is a vision that will take many years and tens of billions of dollars to fully realize, and the president can count on me to help.

The president is rightfully frustrated with Congress’s inaction regarding the humanitarian and security crisis at the nation’s southern border. Even though Republicans and Democrats spent the past several decades in the halls of Congress and on the campaign trail promising the American people that they would work to secure U.S. borders, some of my colleagues seemingly made a politically calculated decision to block the president’s good-faith efforts to finally get it done. They have regressed to the point where a Democratic presidential contender such as Sen. Kirsten Gillibrand (N.Y.) and a possible candidate, former congressman Beto O’Rourke of Texas, are even entertaining the possibility of tearing down existing physical barriers.

Although Trump certainly has legitimate grievances over congressional Democrats’ obstruction of border-security funding, his national emergency declaration on Feb. 15 was not the right answer.