Sam Nunberg is under scrutiny in the Russia investigation

Next to the Russian investigation and the former trump aide who made headlines saying he wouldn't talk to special counsel Mueller's team. Now he's emerging from six hours of testimony before a Washington grand jury. What Sam nunberg is revealing tonight about that courtroom encounter. Here's ABC's Tara Palmeri with that interview. Reporter: Former trump campaign adviser, Sam nunberg, tonight, under the glaring spotlight of the Russia investigation. Testifying for six hours in front of the grand jury. I'm going to be the first one in history to flat-out say I'm not going. Reporter: This, after making headlines with a media meltdown. On Monday, he said on countless cable shows that he would refuse ..