It would seem like a pretty safe bet to invest money into businesses directly linked to the higher ups in Trump's cabinet. I would think Goldman Sachs is the safest bet in the world right now.
That said, I try not to invest in individual stocks since I'm not smart enough nor have the time to try and beat the market.
Hard to say, Nordstrom closed up three bucks after the Trump tweet. His policies will probably be good for some sectors while getting trashed by him may become a badge of honour for some others.