Mitt Romney’s selection of Paul Ryan as his running mate for the presumptive Republican presidential ticket brought an immediate response from President Obama’s re-election campaign, but it could also have a trickle-down effect on several races in the battle for control of the Senate. Ryan,...

Read more http://feeds.abcnews.com/click.phdo?i=e4dcb55d973aa85b0552012f4fef4e48