Mark Grimaldi, Executive Producer of The Leslie Marshall Show, guest hosts for Leslie during today's show.

He's joined by Political Strategist Brad Bannon and callers as they discuss Donald Trump officially becoming the first major party presidential candidate to not release his tax returns in 40 years. They also discuss the potential reasons Trump made this decision, and what the long terms effect could be on transparency in politics.

Brad Bannon runs Bannon Communications Research, a polling, message development and media firm which helps labor unions, progressive issue groups and Democratic candidates win public affairs and political campaigns.

Brad is also a senior adviser to and contributing editor for Tiller4you.com, the social media network for politics.

He lectures in Political Science at Salem State University in Salem, Massachusetts.

Brad's Twitter handle is @BradBannon and his website is www.BannonCR.com.

Mark Grimaldi's Twitter handle is @MarkJGrimaldi.

(Image Credit: Twitter)