Absentee and early voting polling places challengers authorization provision

This bill authorizes political parties, candidates, or local officials to appoint voters as "challengers" to observe early and absentee voting locations. For partisan elections, each major party can appoint one challenger per precinct; for nonpartisan races, each candidate can appoint one. Challengers must be Minnesota residents (proving residency via state ID), cannot use undeliverable mail lists to challenge voters, and are barred from interfering with voting or handling voter records. The bill updates election law to explicitly include early/absentee voting locations under existing challenger rules.