The ruling could impact the race between Lehigh County judicial candidates Republican David Ritter and Democrat Zachary Cohen.
Mackenzie, who has served in the House since 2012, is all but assured another 2-year term.
An overwhelming number of mail-in ballot requests statewide and locally come from registered Democrats.
WLVR’s Brad Klein and Jen Rehill review the week’s top stories.
It comes as the Lehigh County DA plans to station detectives at mail-in ballot drop boxes.