The point of filing the case in Pennsylvania is a) Berg lives in Pennsylvania (is the former deputy attorney general of PA) and b) If 0bama is disqualified from the ballot in Pennsylvania, he cannot win. 0bama isn’t expected to win Montana, so ballot disqualification there would have zero impact on the election.
Some should have filed in Florida, Ohio, Virgina , Michigan, even California .
If it is relatively inexpensive to do, why not do it in every state that can go on record and get it elevated in the news.