The unemployment rate amongst blacks and Latinos has been on a steady decline since 2009.
It's neither Obama nor Trump. Economy of the US size has its own massive inertia and cycles.
What that graph does not show is debt. From the national, to trade, corporate, consumer, student loans, credit card, and mortgage.
The US prosperity is a balloon filled with funny gas - borrowed money. Subtract that and the average American would show negative net asset value going into thousands.
In that sense, nothing has changed. It's actually getting worse as consumers, who are as stupid consuming as they are voting, are more "optimistic" and "confident".
But, when Trump wants to stop the predators like China and the EU and the swamp that loves making things there to sell them to the underemployed Americans, and talks tariffs, the swamp and the Euros go apeshit screaming "trade war!!!". Like we have not been in it for decades as the world-class losers.