Sen. John ThuneJohn ThuneGOP ObamaCare fight faces do-or-die procedural vote Four GOP senators will vote against taking up healthcare bill without changes Week ahead in tech: Lawmakers turn focus to self-driving cars MORE (R-S.D.) boots were made for walking, judging by a tweet he posted late Thursday afternoon.

The senator tweeted:
Wearing a smart pedometer to count my steps as part of the American Horsepower Challenge. Learn more: