You will see a lot of Rep. Diana DeGette, a Democrat from Colorado, today.
She is serving as speaker pro tempore and presiding over the US House of Representatives for the debate on the impeachment of President Trump.
Here's what Rep. DeGette said about this in a statement:
“I am honored that the speaker has asked me to serve as speaker pro tempore of the House and to preside over most of the impeachment debate. None of us came to Congress to impeach a president, but every one of us – when we assumed office – took an oath to uphold the constitution. This is a sad and somber moment in our nation’s history and the responsibility to preside over this important debate is something I will not take lightly."