Final answer:
Taft had problems with Progressives in the areas of protective tariffs and the growing labor union movement.
Step-by-step explanation:
Taft had problems with Progressives in two areas: protective tariffs and the growing influence of the labor union movement. He endorsed the Payne-Aldrich Act of 1909, which raised tariff rates on over eight hundred products. This angered the Progressives who wanted lower tariffs. Additionally, Taft's creation of the U.S. Chamber of Commerce in 1912 was seen as an attempt to offset the labor union movement, further alienating Progressives in his own party.