Lyle Denniston: “Acting quickly and setting the stage for the Supreme Court to act next month, challengers of a Montana law limiting corporations’ spending to influence state elections mailed their reply brief to the Court on Friday.  Among other arguments, they urged the Court not to consider developments in campaign finance since the Court’s 2010 ruling that is centrally at issue: Citizens United v. Federal Election Commission.  Again, they urged the Court to act summarily, without formal briefing and oral argument.”