Several current and former law enforcement officials said an Obama-era investigation found some evidence that Ms. Omar had entered into a sham marriage with a man suspected of being her brother.
As Trump officials stump for Republican candidates facing difficult races, ethics experts say they are being lax about complying with the Hatch Act, a federal anti-corruption law.
Together, they have pursued cases against the president’s enemies and protesters and amplified false claims of widespread election fraud, often citing thin evidence.
More than a dozen news organizations have asked a federal judge to unseal documents related to a search warrant executed at Ms. Omar’s home this month.
In the legal tangle between the Justice Department and California, a federal judge on Tuesday deferred a ruling but said the government already had a remedy it could use after the election.
In court testimony, the agent outlined the willingness of Kash Patel, the F.B.I. director, to take orders from President Trump to investigate his perceived enemies.
The investigation of Cassidy Hutchinson was directed to the Justice Department’s civil rights division, which normally focuses on issues like police violence and election integrity.
The parents of the Minneapolis nurse who was fatally shot by federal agents in January said on Tuesday that the government had ignored and misled them.
State and local plans for Election Day include how to react to potential ICE raids, misbehavior by federal election monitors and attempts to seize votes or machines.
A federal judge stopped the Trump administration from cutting trees and prohibited other changes at the park where the president has sought to overhaul a golf course.
Trees that have been cut down at East Potomac Golf Links are seen earlier this month in Washington. The Trump administration and the National Park Service moved to cut down up to 529 trees at East Potomac Golf Links.
By a 2-1 vote, a federal appeals court panel denied the Trump administration’s request that it immediately order the state to set aside 20,000 mail-in ballots.
Lawyers for James B. Comey said the case centered on an issue that had already been investigated and had not led to charges, of a purported leak of national security information to The Times in October 2016.
A lawsuit by the Justice Department challenging a potential narrow loss by the GOP Senate incumbent in Alaska reflects a new tactic by the president to try to shape the election results.
With moves in Alaska and California, the department has stepped up interventions in the midterm elections as the president’s instrument of unmediated executive power.
President Trump during a campaign rally in support of Senator Dan S. Sullivan in Wasilla, Alaska, this month. Mr. Trump urged the Justice Dept. to intervene in the Senate race.
No obvious legal authority supports a pre-emptive effort to block the certification of Alaska’s Senate election if the Republican incumbent narrowly loses.