If you click on the link in the OP, the article points to a continuous slide in active-duty support over the last two years. If the trend in the graph continues (at the same rate), then trump will be underwater before the/his next election, which will be HUGE ...
The graph with an unnecessarily truncated y-axis and meaningless decimal points does not help your case. Why are you posting it?
Even this dfference is on the edge of significance at best, and the article repeatedly points to meaningless differences as if their direction were important. Not much to be proud about in this observation, I'm afraid.
But it is in a critical zone. President Trump cannot expect the military to do his political dirty work on his behalf. He is leaving the range in which he can count on the soldier vote to rescue him politically.
It also suggests that the President has little leeway for any War for Profit -- let us say taking over Cuba or Venezuela on behalf of American corporate interests. Trump behavior is getting erratic. The military culture may like the chest-pounding nationalism of Trump more than the subdued nationalism of Barack Obama, and likes the provision of more materiel to the Armed Forces.
Still, who wants to die for Big Oil, big banks, or agribusiness corporations?