If it's Monday, classified controversy, growing frustration inside the White House, even as the Biden administration admits more classified material was found at the president's Delaware home.

Plus, rescue workers racing against the clock, searching for survivors after a Russian missile slammed into an apartment building, killing dozens as the U.S. begins expanded combat

training for Ukrainian forces. And honoring Dr. Martin Luther King Jr.'s life and legacy.

President Biden marks the moment in Washington after making history at Dr. King's Ebenezer Baptist

Church, asking churchgoers, quote, what kind of country do we want to be?

Welcome to meet the press now. I'm Kristen Welker. Thank you so much for being with us on this day in which we honor Dr. Martin Luther King. We will have more on his life and legacy throughout the show. But first we begin with growing frustration from both Democrats and Republicans over the classified documents found at President Biden's home and at his former private office.

Inside the White House, three sources familiar with the matter tell NBC News.

President Biden is particularly upset over what he views as probable sloppiness by AIDS who packed up

his items at the end of the Obama administration.

The sources say the president also feels his administration has been cooperative

since the documents were first discovered and that the response to this story has not drawn as

stark of a contrast between his administration's handling of sensitive government information

with that of his predecessor. Now this comes as over the weekend, the White House revealed five

additional pages of classified documents

were found at the President's Delaware home, bringing the total number of batches found there to

three. And yesterday, Congressman James Comer, new Republican chair of the House Oversight Committee,

wrote a letter to White House Chief of Staff Ron Claim demanding visitor logs. Listen.

What we see with President Biden is there are multiple locations.

We would never have known about the possession of the classified documents, were it not for

investigative reporting by CBS. The administration hasn't been transparent about what's going

on with President Biden's possession of classified documents. And we just want

equal treatment here with respect to how both former President Trump and current President Biden

...