Finer details on President Donald Trump's upcoming sit-down with Russian President Vladimir Putin have still not been released, with White House press secretary Karoline Leavitt telling reporters on Tuesday that scheduling is "still being ironed out."

But on the selection of Alaska as the location, Leavitt said: "The president is very honored and looks forward to hosting, President Putin on American soil."

White House press secretary Karoline Leavitt was asked on Tuesday why Ukrainian President Volodymyr Zelenskyy wasn't invited to Friday's summit in Alaska. Leavitt said this meeting came at Russian President Vladimir Putin's request, relayed to Trump by special envoy Steve Witkoff after Witkoff met with Putin in Moscow last week.

"The goal of this meeting for the president is to walk away with a better understanding of how we can end this war," Leavitt told reporters.

ABC News Senior Political Correspondent Rachel Scott asked Leavitt if Zelenskyy has given Trump any red lines or nonstarters ahead of his conversation with Putin.

"Look, I don't want to reveal the private conversations between the president and President Zelenskyy, but what I can tell you is that the president has deep respect for all parties that are involved in this conflict and are trying to bring this conflict to an end," Leavitt responded.

Leavitt added, "I think this is a listening exercise for the president. Look, only one party that's involved in this war is going to be present. And so this is for the president to go and to get, again, a more firm and better understanding of how we can hopefully bring this war to an end."

Approximately 850 officers and agents were "surged" across D.C. Monday night after President Donald Trump declared a crime emergency in the capital, during which they made 23 arrests, according to White House press secretary Karoline Leavitt.

The arrests included homicide, firearms offenses, possession with intent to distribute narcotics, lewd acts, stalking, possession of a high-capacity magazine, driving under the influence and reckless driving, she said.

Six illegal handguns were also seized, she said.

"This is only the beginning," Leavitt said during a press briefing Tuesday. "Over the course of the next month, the Trump administration will relentlessly pursue and arrest every violent criminal in the District who breaks the law, undermines public safety and endangers law-abiding Americans."

Members of the National Guard gathered at the DC Armory's Joint Force Headquarters Tuesday morning, before filing out approximately one hour later.

Many confirmed to ABC News that they are active members of the National Guard.

They arrived in what appeared to be personal vehicles before entering the building alone or in small groups, with some carrying duffel bags and backpacks.

When asked if they were given any marching orders, one told ABC News "not really," and that they were just told to gather.

-ABC News' Emily Chang