Answer: Eugene V. Debs
Explanation:
The Progressive era of 1896 – 1916 saw Eugene Debs become the leader of the Socialist movement in the United States when he founded the Socialist Party of America in 1901.
He ran for President as a candidate of this party five different times with the highest percentage of votes he ever got being 6% in 1912. Mr. Debs was in and out of prison for perceived actions against the government with the last being when he spoke against the U.S. joining WW1.
