Socialist Alternative entered a candidate in the November 7, 2017 elections for Minneapolis city council, ward 3. That candidate, Ginger Jentzen, placed first among the first choice ballots. Minneapolis uses ranked-choice voting. Jentzen did not win a majority when the first place votes were counted, so the city then counted the 2nd, 3rd, and 4th place ballots. When those votes were counted, Jentzen had lost to a member of the Democratic-Farmer-Labor Party, but even in the final tally she had over 40% of the vote.
See the wikipedia article for the 2017 Minneapolis city elections. Scroll down to ward 3. One of the four candidates in the race was a Green, Samantha Pree-Stinson. The Pree-Stinson campaign did not ask voters to cast their 2nd choice votes for Jentzen.
Minneapolis elections allow party labels on the ballot, but parties don’t have nominees. There was no one in the race with the label “Republican”; there were two candidates with the label “Democratic-Farmer-Labor.”