There are two problems.
1 - He has dementia.
2 - He is a jerk.
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But he is on the DEM ticket and most likely to be the candidate.
Problems abound for all candidates, some more than others. The
question remains as to which candidate can influence the voters.
Yes - he is on the Dem ticket because the Easter Bunny Cabal led by Obama annd Hillary Clinton together with the militarized secret intelligence agencies police state are actually ruthlessly running the country. And they think nobody notices.