I won’t go so far as to say a Romney loss would end Ryan’s career. I think he’ll be around a LONG time ... he’d still be a legit leader in the House, and he’d be a real contender in a 2016 and/or 2020 GOP Primary.
That being said, we’d all be better off with him as Vice President come January.
SnakeDoc
The Conservative Movement would benefit tremendously.
Romney's image is that of a squish.
With Ryan off his right shoulder, with the Tea Party behind him, he will have to lean in that direction, else he risks losing re-election.
If Romney knows nothing else, he knows which way the wind blows.