Flake bows out

POLITICO reporters discuss Senator Flake pulling the plug on his reelection campaign in a dramatic Senate floor speech and what's to come in the second open Senate race in Arizona since 1994. The panel also discusses the 2016 Facebook ads that were placed by a Russian company last year. They’re now the subject of multiple investigations, but there’s an also an effort to close some regulatory loopholes to make sure this doesn’t happen again.