Career prosecutors shut down the case in 2016 over lack of evidence. The new interest comes as Mr. Trump has taken the highly unusual step of calling for investigations into political rivals.
Lawmakers from both parties see it as a state decision and vow to force the attorney general, Jeff Sessions, to back down.
The Justice Department rescinded 25 guidance documents dating back decades after Attorney General Jeff Sessions said that such documents circumvented the regulatory rule-making process.
In a report intended to bolster its case for more border security, the Trump administration said one in five inmates in federal prisons were foreign-born.
The investigation was ordered after a judge declared a mistrial, saying that prosecutors had improperly withheld evidence from the defense.
The man, Sergio Jose Martinez, a Mexican immigrant, attacked two women on July 24. He received national attention after Attorney General Jeff Sessions highlighted his case.