It's easy...just show them this:
Then have them watch Obama's final State of the Union address this Tuesday:
"The verdict is clear: Middle-class economics works. Expanding opportunity works." —@POTUS #JobsReport https://t.co/OnMbBo0FxW— The White House (@WhiteHouse) January 8, 2016
As Hillary says almost every day on the trail, the economy does better when there's a Democrat in the White House. This is merely the most recent example, and it's a winning message if ever there was one.