They called him Calvin Coolskates

Here, President Coolidge poses next to a car. But only next to a car because President Coolidge stepped into a car maybe three times in his life. He skated everywhere he could and would only suffer gas guzzlers when obliged to. One could say he was a proponent for green energy before anyone made that up.
He often referred to himself as Calvin Coolguy247 but the nickname never stuck.