Maine Representative Louis Luchini (D-Ellsworth) and five other legislators have introduced LD 295. Current law says the only way a party can remain on the ballot is to have had at least 10,000 registered members who actually voted in the general election (it doesn’t matter whom they voted for; they merely must have cast a ballot). The bill would retain that provision, but provide that a party also remains on if it polled at least 5% for the office at the top of the ballot. Here is a copy of the bill. Gary Johnson received more than 5% of the presidential vote in November 2016 in Maine.
Another bill, which hasn’t yet been introduced, but which is backed by the Secretary of State, would ease the procedures for a group to qualify as a party. The existing law required 5,000 registered voters by December of the year before the election, but that law was enjoined by a federal court last year.