AFT-West Virginia's endorsement comes four years after the union endorsed Gov. Jim Justice.
Around 200 people attended a service at Covenant Church in Fairmont.
U.S. Sen. Bernie Sanders, I-Vt., won West Virginia's Democratic presidential primary in 2016.
Both candidates agreed to take part in a debate hosted by the West Virginia Broadcasters Association.
All but six West Virginia counties have declared results in last week's primary election as of Tuesday evening.
Gov. Jim Justice faces Kanawha County Commissioner Ben Salango in this year's gubernatorial race.
U.S. Sen. Shelley Moore Capito, R-W.Va., will take on activist Paula Jean Swearengin in her bid for a second term.
117 seats up for election this year.
People seeking public office have not been able to take part in traditional campaign activities because of the coronavirus.
Senate President Mitch Carmichael, R-Jackson, is facing two Republican challengers in his quest for a third term in office.
Candidates depending on other means of voter outreach as face-to-face contact is limited.
Dr. Matthew Hahn, a family physician from Berkeley Springs, is running for the 2nd Congressional District seat.
It will be a busy election year in West Virginia.
The former Logan County senator filed paperwork with the Secretary of State's Office on Monday.
Jones said the two had a nice conversation on Wednesday.
Voters in Monongalia County overwhelming rejected Amendment One, supported Kendra Fershee over incumbent David McKinley, and kicked two Republican incumbents out of office.
Ihlenfeld defeated Senate Majority Leader Ryan Ferns.
Goodwin becomes the first female mayor in Charleston history.
U.S. Sen. Joe Manchin, D-W.Va., was elected to his second full term in office Tuesday.
Ryan Ferns, Riley Moore are upset in General Election.