HELENA — Conservative groups are asking a judge to nix Montana's campaign contribution limits, the latest effort to undo the state's political finance restrictions.
A federal trial opened Wednesday with conservative and Republican groups, joined by American Tradition Partnership, arguing that the limits prevent effective campaigning.
State lawyers countered that political parties are allowed to help candidates in other ways.
U.S. District Judge Charles Lovell has previously struck down other state campaign laws dealing with attack ads and loosened restrictions on some corporate political spending.
The U.S. Supreme Court separately this year threw out the state's century-old restrictions on other corporate politicking.