Donald Trump has announced his third official presidential campaign. 
But what does it mean for the multiple criminal investigations he's facing, and the possible charges that could follow? 
Today, former Watergate prosecutor and legal expert, Jill Wine-Banks, on how the former president is using his candidacy to shield himself from his legal woes, and why - in her view - it won't work. 
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Jill Wine-Banks, former Watergate prosecutor and former US general counsel of the army