Republican candidate for U.S. Senate Sen. David Perdue speaks during a campaign rally on Friday, Nov. 13, 2020, in Cumming, Ga. Perdue and Democratic candidate Jon Ossoff are in a runoff election for the Senate seat in Georgia. But for Sen. David Perdue, a Georgia Republican, the crisis last March signaled something else: a stock buying opportunity. The Cardlytics transactions were just a slice of a large number of investment decisions made in the early days of the pandemic by Perdue and other senators. “The bi-partisan Senate Ethics Committee, DOJ and SEC all independently and swiftly cleared Senator Perdue months ago, which was reported on," Burke said. Isakson, who served with Perdue, took steps to avoid the type of scrutiny Perdue is now facing.