On December 17, West Virginia Delegate S. Marshall Wilson announced that he has changed his registration from Republican to independent. He was first elected to the legislature in 2016. In 2018 he was re-elected with no general election opponent. He did not say if he will run for re-election in 2020.
No one who was not a Democratic or Republican nominee has been elected to the West Virginia legislature since 1906, when a Prohibition Party nominee was elected. Thanks to Jeff Becker for the news about Wilson. Thanks to the commenters who pointed out that the legislature had another independent a few years ago, although, like Wilson, he wasn’t elected as an independent.