DES MOINES — The cavalry arrived too late for Gov. Scott Walker, but other candidates struggling in the shadow of Donald J. Trump hope their own backup – in the form of “super PACs” flush with money for television commercials – will soon be riding to their rescue. Even as Mr.Source: Republican ‘Super PACs’ Turn to TV Ads for High-Stakes...

The Libertarian Party and Green Party and their 2012 candidates for president are readying a legal complaint against the Commission on Presidential Debates, hoping that a new legal argument -- an anti-trust argument -- will break the "duopoly" that's dominated the stage.Source: Libertarians, Greens ready lawsuit against Commission on Presidential Debates...