Minneapolis live updates: DOJ launches investigation into Pretti killing, Deputy AG Blanche says

While promoting her documentary on "Fox and Friends," first lady Melania Trump called for Americans "to unify" and called for peaceful protests amid demonstrations in Minneapolis in response to immigration enforcement operations in the city.

"I know that my husband, the president, had a great call yesterday with the governor and the mayor. And they're working together to make it peaceful and without riots," she said. "I'm against the violence, so please, if you protest, protest in peace."

-ABC News' Michelle Stoddart

Minnesota Gov. Tim Walz met with White House Border Czar Tom Homan Tuesday morning, according to the governor's office.

The two spoke about a number of items, including a "significant reduction in the number of federal forces in Minnesota, and an end to the campaign of retribution against Minnesota."

"The Governor and Homan agreed on the need for an ongoing dialogue and will continue working toward those goals, which the President also agreed to yesterday," a statement from the governor's office reads.

Homan will work with the Minnesota Department of Public Safety as his primary liaison, according to Walz's office.

Former Homeland Security Assistant Secretary John Cohen said the contradictory statements coming from DHS about these two Americans shot in Minnesota is creating a profound credibility problem for the administration.

"Yeah, in many respects, I don't recognize the department I worked for and respect and love," Cohen said. "Every piece of commentary you see on social media or the or in the media that that calls into question the integrity, the honesty and the value of these operations, causes the public to lose trust in the government and in these operations."

The American Federation of Government Employees, the largest federal employee union which also represented Alex Pretti, issued a statement Monday night calling for the resignations of DHS Secretary Kristi Noem and Deputy White House Chief of Staff Stephen Miller.

AFGE President Everett Kelley contended that their immigration policy and actions led to the nurse's death.

"Taken together, the actions of Miller and Noem, both before and after Alex's killing, make clear they are unfit to serve in their current positions, or any position requiring the public trust," Kelley added.