Wall Street strategists warn that U.S. stock market gains tend to be at their weakest under certain mid-term election outcomes. Although history shows that U.S. mid-term election outcomes are generally favorable to the stock market regardless of which party wins, some Wall Street strategists are warning clients to temper their optimism this time around. On the fundamentals, potential new powers for the Democrats could bring tighter federal and state-level regulation of the artificial intelligence industry, posing the threat of a slowdown in corporate earnings, while elevated interest rates also cast doubt on whether history will repeat itself.