Trump has been skipping daily intelligence briefings, because he believes that he doesn't need them:
"I get it when I need it," Trump said of intelligence reports. "I don't have to be told -- you know, I'm like, a smart person. I don't have to be told the same thing in the same words every single day for the next eight years. ... But I do say, 'If something should change, let us know.'"
Crooks and Liars writes that "A man who didn't even know that Russia had already invaded the Ukraine is a man who needs more information, not less:"
The Presidential Daily Brief has, in one form or another, been given to the president and other relevant Executive branch personnel since 1961. That's over half of a century.
The purpose of the briefing is to give the Commander-in-Chief a synopsis of important intelligence events, including updates on previous intelligence releases. We can actually look at PDBs from several administrations at the CIA. I've looked at several. They're not large, they don't take much time, and they all contain something new, relevant, and important.
Let's all take a moment to reflect upon what happened the last time we had a president who dismissed intelligence briefings with "All right, you've covered your ass now."