People vote their pocketbooks. That's the old saw. The more money they have, and the better the economy appears, the better it will be for the party in power.
If you're a stereotypical member of the mainstream media, that means you received some terrible news today. The jobs numbers came in, they're very, very strong, and it's almost impossible to make a non-ridiculous argument that they're not directly related to Trump's presidency. Oh sure, there are a few talking heads who are still trying to claim this is all Obama's doing, but they sound more and more asinine by the second.