a showdown on capitol hill today and the irs scandal and former congressman angelina weiner trying to push past his scandal by officially entering the mayor's race in new york city. Let's bring in jon... See More
a showdown on capitol hill today and the irs scandal and former congressman angelina weiner trying to push past his scandal by officially entering the mayor's race in new york city. Let's bring in jon karl for more. The irs official who first went public with details is taking the fifth today. Explain who she is and why she's doing it that's right, this is lois learner in many ways the woman at the center of all this. She was the head of the irs division on tax-exempt organizations. That's the division that did the targeting. Now, her lawyer says she is taking the fifth but she has committed absolutely no crimes. It's simply that given the circumstances she cannot testify today. Those circumstances are a criminal investigation by the department of justice and the fact that many members on that committee have accused her of repeatedly lying to congress, but even though she won't talk the spectacle will be there. The committee is dragging her to the hill and ask her the questions anyway and make her take the fifth. She doesn't want to put anything more on the record right now. Let's talk about angelina weiner. We saw that video come out overnight. Formally getting into the race. Let's show a little bit of it. Every day starts right here. And it's the best part of my day. Look, I made some big mistakes and I know I let a lot of people down but I also learned some tough lessons. We love this city and no one will work harder than anthony. I will fight hard for you every day. His wife, hillary clinton's aide.Uphill fight but he has a big war chest. Reporter: The most improbable comebacks ever. He does have $4.3 million left in his campaign war chest which gives him a big edge and nobody has more name recognition than anthony weiner.
This transcript has been automatically generated and may not be 100% accurate.