See also Miles Taylor, At Homeland Security, I saw firsthand how dangerous Trump is for America:
The president has tried to turn DHS, the nation’s largest law enforcement agency, into a tool used for his political benefit. He insisted on a near-total focus on issues that he said were central to his reelection — in particular building a wall on the U.S. border with Mexico. Though he was often talked out of bad ideas at the last moment, the president would make obviously partisan requests of DHS, including when he told us to close the California-Mexico border during a March 28, 2019, Oval Office meeting — it would be better for him politically, he said, than closing long stretches of the Texas or Arizona border — or to “dump” illegal immigrants in Democratic-leaning sanctuary cities and states to overload their authorities, as he insisted several times.
Trump’s indiscipline was also a constant source of frustration. One day in February 2019, when congressional leaders were waiting for an answer from the White House on a pending deal to avoid a second government shutdown, the president demanded a DHS phone briefing to discuss the color of the wall. He was particularly interested in the merits of using spray paint and how the steel structure should be coated. Episodes like this occurred almost weekly.