Libertarian candidate Marc Victor dropped out of the U.S. Senate race in Arizona on Tuesday and endorsed his GOP opponent, Blake Masters.
The late stage shakeup comes a week before the election and has the potential to swing what has become a close race between Masters and incumbent Democratic Sen. Mark Kelly.
Masters has trailed Kelly for most of the race but has closed the gap in the past month. Election forecasters for outlets such as Politico and Cook Political Report have moved the Arizona Senate race from a Democratic-leaning race to a toss-up in response.
