Impossible, due to the Civil War.
If they didn't have attempted to stop the Reconstruction, even after Booth attempted to murder Lincoln, then they might have survived.
I meant, the slogan of their 1868 Convention was "This is a White Man's Country; Let White Men Rule", meaning they still wanted to overthrow the results of the Civil War.
Against this, the Populists were born, and, given the Republican Party became more and more business-fiendly, Radical Republicans found a new home with the Populists, and the Democrats ended up divided between both parties.