Faithlessly in a sentence as an adverb

There were 3 others that voted faithlessly but those votes were invalidated by their State’s, one of them changed his vote back to who he pledged for, and the others were replaced with alternates.

Faithlessly definitions

adverb

in a disloyal and faithless manner; "he behaved treacherously"; "his wife played him false"

See also: traitorously treacherously treasonably false