A top Democratic strategist and senior adviser to former President Barack Obama, David Axelrod, is scratching his head over Robert De Niro’s recent visit to the courthouse where Donald Trump is on trial. Axelrod, who’s now a commentator on CNN, argues “whoever at Biden HQ directed De Niro’s performance Tuesday probably should have left it on the cutting room floor.” Simply put: The famous actor did nothing to shore up support among voters that polls show Joe Biden is losing and it turned into a spectacle that Trump and his supporters used to their advantage. Axelrod wrote on CNN: The stated go…