Former Massachusetts Governor Bill Weld Rejoins GOP

Bill Weld, 2016 Libertarian vice presidential nominee, speaks in Albuquerque, New Mexico, on Aug. 20, 2016.

Photographer: Sergio Flores/
Lock
This article is for subscribers only.

Boston (AP) -- Former Massachusetts Gov. William Weld has changed his party registration from Libertarian back to Republican as he mulls a possible primary challenge against President Donald Trump.

Weld served as a Republican governor from 1991 until 1997. He later became a Libertarian and ran for vice president on a ticket with former New Mexico Gov. Gary Johnson in the 2016 election.