Rep. Ilhan Omar, D-Minn. (AP)

The Justice Department, in an apparent escalation of a long-running investigation involving the immigration history of Rep. Ilhan Omar, D-Minn., has issued subpoenas to members of her family, The New York Times reported Tuesday, as the congresswoman accuses the Trump administration of political retribution for her outspoken criticism of the president.

The subpoenas mark a new development in a probe that has drawn scrutiny after federal agents searched Omar's Washington-area home Monday, an action she condemned as an attempt to intimidate political opponents and weaponize federal law enforcement.

"For ten years, Trump has targeted me with baseless lies and smear campaigns," Omar wrote on social media Monday. "This is just the latest escalation in his c...