My question is this, can the Progressive Party founded in 1912 establish itself as a viable third party on the national level if Teddy Roosevelt wins the 1912 Presidential election? Let's not worry about the exact specifics of a Roosevelt victory, that's not the point of this thread.
However, let's assume that the Progressives win about the same number of seats in the HoR (~9).
Personally, I think the Progressive Party could collapse even if TR wins. The Progressives will have to use the momentum of the presidential victory, but if Roosevelt gets bogged down in a quagmire with a Democratic controlled Congress, support could collapse.