voter intimidation in warren township

for the most part, the election seems to be going smoothly so far here in indiana (or at least in marion county)—with one notable exception. from the indy star:

The removal of two Republican election workers from a Warren Township polling site - for using improper methods to challenge voters' rights to cast a ballot - has prompted local Republican Party leaders to issue a statement of regret.

The two officials - an official challenger and a clerk - were removed by unanimous vote of the Marion County Election Board.

The officials were reportedly challenging voters with information obtained through party affiliation reports, which is not one of the accepted challenges such as a person's address, age or lack of ID.

i'm not entirely clear on what that last part means. they were challenging voters simply for being registered democrats? or based on some other arbitrary information that they got from these reports?

also, this might not have been an isolated problem:

Election officials also heard reports from the Children's Museum polling site that similar challenges were being made. But when they approached the person doing that, he left the area.¶