Austin mass shooter Ndiaga Diagne entered US during Clinton admin., became citizen under Obama — despite string of busts

The gunman behind Austin’s possible terror-related mass shooting entered the US  and cemented his legal immigration status under Democrat administrations — despite a growing criminal record.

Senegalese national Ndiaga Diagne, 53, arrived in America on March 13, 2000, on a B-2 tourist visa during the Clinton administration, a source familiar with his immigration history told The Post on Sunday.

Diagne — who killed two people and wounded 14 more during his rampage outside a Texas bar early Sunday — then became a lawful permanent resident on an IR-6 visa in June 2006 when he married a US citizen, the source said.

He had already racked up at least one arrest before that, for illegal vending in June 2001 in New York City, law-enforcement sources said.

He then went on to lodge a string of other arrests in the Big Apple between 2008 and 2016 — but that didn’t stop him becoming a naturalized US citizen on April 5, 2013 — around the start of former President Barack Obama’s second term, sources said. Those three arrests are sealed, sources said.

Diagne also was arrested in Texas at some point on undisclosed charges, sources said.