Alejandro "Ale" Mayorkas is testifying on Capitol Hill today, as Biden's pick to lead the Department of Homeland Security - the 3rd largest federal agency.

It's not his first confirmation hearing -- previously nominated by Obama as Dep Sec in 2013, confirmed in 2014.

Mayorkas, unlike some Senators in the hearing, has kept his mask on the entire time so far -- delivering his opening statement, and even now as he begins to take questions.

Sen. Portman asking what Mayorkas learned from an investigation into his involvement in investor visa cases while he was Deputy Secretary...

Mayorkas: "I learn each and every day to be better tomorrow than I was today...these weren't the only 3 cases I was involved in, whether they involved the rich or the poor...I became involved to ensure our agency improved each day..."

Mayorkas on leveraging DHS resources to support pandemic response:

-FEMA should to ensure supply chain
-CISA (cyber security) should protect supply chain from cyber attacks and ensure other agencies' work protected

"the reach of the department is significant..."