GOP donors shift focus to congressional-race ads

Hundreds of millions of dollars that Republican groups had been poised to spend in the 2016 presidential election are moving into Senate and House races as many big donors look to distance themselves from the party's presumptive nominee, Donald Trump. These groups and their Democratic counterparts have already spent more than $25 million on advertising in Senate general-election races alone, according to Kantar Media/CMAG, outpacing both the 2014 and 2012 campaigns in outside spending.