Kamala Harris and Donald Trump.RONDA CHURCHILL/AFP via Getty Images. NATALIE BEHRING/AFP via Getty Images.As election day draws near, 400 Wall Street money managers identified their top concerns.National debt, economic growth, and immigration reform are big issues for the next administration.Here's how institutional investors are preparing their portfolios and hedging risk.With just a few weeks until Election Day, the presidential race is neck and neck between Kamala Harris and Donald Trump.There's a lot at stake in November.