The correspondence, part of a series of exhibits provided to Senate investigators and reviewed by Breitbart News, took place in the weeks leading up to the Trump Tower meeting.

Earlier this week, Breitbart News cited witness testimony saying Lieberman was present at one and possibly two dinner meetings between the controversial Fusion GPS firm and key participants in the infamous June 2016 Trump Tower meeting. Also, Lieberman met with one Russian participant the same day of the Trump Tower meeting, according to separate testimony.