"I give us an A+ on the government, on economics, on everything."

The mid-term elections are when the US electorate gets to grade its president on his performance.

Politicians have traditionally side-stepped such crude metrics as school grades; Trump leans into them.

Linguistically, his formulation is simple and clear. He employs the 'rule of three' for emphasis — on…, on…, on… — to escalate his point.

Then he uses parallelism and antithesis to balance two opposing clauses:

But it's the school grade that will draw attention, perhaps laughter, some disdain, and some nodding heads.

The president likes the language of big numbers and measurable quantifiers. The midterms may provide some.