What has he got against Puerto Rico?

Oh, yeah, San Juan's mayor said something bad about him.

Puerto Rico's Medicaid program has been relying on a series of short-term funding extensions since the fall, after confronting a fiscal cliff on Sept. 30 when a temporary boost in money — one of several that Congress has enacted in recent years — was set to expire.

[...]

Republicans and Democrats on both the House Energy and Commerce Committee and the Senate Finance Committee had endorsed legislation providing roughly $12 billion in Medicaid funds to Puerto Rico over four years, a rare area of bipartisan backing. But over the weekend the president balked at that amount because he believed it was too much.

[...]

"This administration remains committed to properly prioritizing U.S. taxpayer dollars," said Chase Jennings, a spokesperson for the White House Office of Management and Budget.

  Politico

Do they not realize Puerto Ricans are U.S. taxpayers?

...but hey, do what you want...you will anyway.