At the November 2010 election, Mark C. Miller, Green Party nominee for the Massachusetts state house, polled 45.02% of the vote in a two-person race. The district was the 3rd Berkshire district, centered on Pittsfield in the western end of the state.

This is the closest that a minor party nominee has come to being elected to the Massachusetts legislature since at least 1932, and probably since 1917, when the Socialist Party last elected a state legislator in Massachusetts. The previous best Green Party showing for the Massachusetts legislature had been in 2002, when a Green received 37.28% in a two-person race. The best Libertarian showing for the Massachusetts legislature had also bee in 2002, and was 25.26% in a two-person race. The best Socialist Party showing in the last 75 years had been in 1934, and was 16.70%. Records are not at hand for years before 1934.

Miller, 64, is a former editor of the Berkshire Eagle. His only opponent, Democratic incumbent Christopher Speranzo, had agreed to debate Miller but then had not shown up at the debate. Speranzo has been in the legislature since 2005.