Former President Trump is expected to surrender in New York early next week, sources familiar with the matter told ABC News.

While a day has not been firmed up, sources said that Tuesday is the day being discussed by Trump's legal team and the Manhattan District Attorney's Office.

House Speaker Kevin McCarthy said in a tweet that the House GOP will use its power to hold Manhattan District Attorney Alvin Bragg "and his unprecedented abuse of power to account."

"The American people will not tolerate this injustice," McCarthy said, adding that Bragg has "weaponized our sacred system of justice against President Donald Trump."

House Republicans have requested documents and testimony from the Manhattan District Attorney's Office in its investigation of Trump, but Bragg has said he won't comply.

-ABC News' Lauren Peller

Manhattan District Attorney Alvin Bragg's office said in a statement that it has contacted former President Donald Trump's attorney "to coordinate his surrender" for arraignment on a state Supreme Court indictment, noting that it remains under seal.

"Guidance will be provided when the arraignment date is selected," the office said.

In the wake of the indictment, all officers with the New York Police Department have been ordered to show up in uniform Friday morning for deployments around New York City, police sources told ABC News.

There are no credible threats, according to the mayor's office.

A spokesman for New York City Mayor Eric Adams issued a statement Friday evening condemning the threatening letter sent to District Attorney Alvin Bragg that included powder later deemed non-hazardous.

"While we cannot comment on the specifics of any ongoing investigation, no public official should ever be subject to threats for doing his or her job," the statement read.

The spokesman added, "I'm confident that every elected official in the City, including Manhattan DA Bragg, will continue to do their work undeterred, and anyone found to be engaging in illegal conduct will be brought to justice."