Why are Trump's latest inflation numbers so low?

Answer: He cheated.

Note in the chart below that the only numbers included are for gasoline and cars. Food, housing, energy and health care are excluded.

Source: US Bureau of Labor Statistics

Don't forget that Trump fired the head of the Bureau of Labor Statistics for producing data he didn't like. When this happened, economists warned this may make future federal data untrustworthy. And so it is.