JOHN YANG:

But much of the day was dominated by mounting questions about the House Intelligence Committee chairman's revelation that Trump transition communications had been intercepted.

Today, Representative Devin Nunes acknowledged he got that information during a meeting with a source, not a White House official, in the Old Executive Office Building in the White House complex.

Today, Spicer said he couldn't say with certainty that the White House wasn't the source of Nunes' information.