I would agree with a "normal" president but seeing the picks for this guy what the US is in for is not going to follow the "normal" pattern. US economy historically has done poorly under Republican control anyway. Stock market is at an all time high now. Add those together and there is a reason Warren Buffett is pulling out of the market right now to sit on dragon pile levels of cash.
Good news for those who can weather the storm though is that we get to buy the dip soon. Bad news for anyone retiring within the next 10 years.