In the mid-1990s, the Alaskan Independence Party was experiencing a boom of sorts. A governor had been elected on its ticket in 1990, when the party was not even a decade old. And membership was swelling.

Among the new recruits was Todd Palin, whose wife, Sarah, would later become governor of Alaska. The Palins attended the party’s convention in their hometown, Wasilla, in 1994, according to party officials, where the party called for a revote on statehood and a draft constitution for an independent Republic of Alaska. Mr. Palin joined the party.

Ms. Palin remained a Republican and never joined the Alaskan Independence Party, but returned to its convention in 2006 to speak as candidate for governor. After she had been elected, she recorded a video greeting that was played at the party convention this year. “Good luck on a successful and inspiring convention,” she said. “Keep up the good work, and God bless you.”

Now that she is the Republican nominee for vice president  for a campaign whose motto is “Country first”  the couple’s interaction with the Alaskan Independence Party has gotten attention because of its reputation as a secessionist group.