Origin of "When fascism comes to America..."

Factual Questions
1

What’s the origin of this phrase?

“When fascism comes to America, it will come draped in a flag, carrying a cross, and promising to protect our children”

2

The phrase, “When fascism comes to America, it will be wrapped in the flag and carrying a cross” is from Sinclair Lewis’s “It Can’t Happen Here”.

3

Thanks!