Progressivism started long before FDR, or even Wilson.

They had to get the idiots in place before they could vote in the 16th, 17th, 18th, and 19th Amendments.

"Started with"?!?

That would be countless assholes in the late 19th century. Including pretty much the entirety of the South. Even Teddy Roosevelt (the "good" Roosevelt) was not immune to the Progressive virus either.

Look at electoral maps from 1868-1900, and get back to me.