Washington (CNN)Speaker Paul Ryan said House Republicans should not betray their conscience when it comes to backing their party's presumptive presidential nominee Donald Trump. "The last thing I would do is tell anybody to do something that's contrary to their conscience. Of course I wouldn't do that," he told NBC News' Chuck Todd in an upcoming episode of "Meet the Press" airing Sunday. "Look, believe me, Chuck. I get that this is a very strange situation. He's a very unique nominee," Ryan added. "But I feel as a responsibility institutionally as the Speaker of the House that I should not...