Since being forced to retire in August 2014, Flynn has been an outspoken critic of the administration, alleging the Obama White House has failed to confront what he calls "radical Islam."

Flynn is now taking his message to the biggest stage possible: the 2016 presidential election. Last week, the New York Post reported that Flynn, a registered Democrat, was being considered as a running mate for Donald Trump on the Republican ticket. In the days since, Flynn has been making the media rounds praising the GOP frontrunner.

The odds are long for the retired three-star general. Flynn is up against a stable of veteran political operatives, including Newt Gingrich, Chris Christie, and Indiana Gov. Mike Pence. According to the most recent media reports, Trump is leaning toward a candidate with a background in politics, rather than the military. Trump is expected to hold a public event on Friday with his selected running mate.