With the so-called Fiscal Cliff looming, a group called "Progress Iowa" is targeting one Iowa senator.
Thursday the group delivered 800 letters to Senator Chuck Grassley's office in Waterloo.
The letters came from Iowans urging Sen. Grassley to end Bush-era tax cuts.
Group members say they hope to put the heat on lawmakers.
In addition to the Waterloo event-- activists delivered letters to Grassley's offices in Cedar Rapids, Des Moines and Sioux City.