President Donald Trump is starting his Labor Day with an attack on a top union leader.

Trump tweeted Monday that AFL-CIO President Richard Trumka "represented his union poorly on television this weekend." He added, "It is easy to see why unions are doing so poorly. A Dem!"

Trumka appeared on "Fox News Sunday," where he said efforts to overhaul the North American Free Trade Agreement should include Canada. He also said of Trump: "the things that he's done to hurt workers outpace what he's done to help workers."

Trump also touted the economy Monday, saying "Our country is doing better than ever before with unemployment setting record lows."

Richard Trumka, the head of the AFL-CIO, represented his union poorly on television this weekend. Some of the things he said were so againt the working men and women of our country, and the success of the U.S. itself, that it is easy to see why unions are doing so poorly. A Dem!

While the unemployment rate of 3.9 percent is not at the best point ever, it is near the lowest in 18 years.

Happy Labor Day! Our country is doing better than ever before with unemployment setting record lows. The U.S. has tremendous upside potential as we go about fixing some of the worst Trade Deals ever made by any country in the world. Big progress being made!