“Biden’s Jack Kennedy remark was so silly that the best strategy was a quixotic look in response...Ryan nailed it.”
Ryan didn’t nail it. He should have used his time on the very next question to point out the under Jack Kennedy, Ronald Reagan, and George Bush (in 2003) tax cuts all resulted in increased tax revenues. He then should have stated that the the democrats’ characterizing Romney’s refusal to admit his plan results in $5 trillion deficit as a lie is itself a lie because the HISTORICAL DATA show Romney to be correct. This is an important enough issue that such a response was absolutely necessary in order to squash Biden like the bug he is. Ryan did not do that.
“And Ryan didn’t argue further on the Iran topic because he sensed Biden’s credibility was finished”
The way to finish off his credibility is to demolish his argument with facts in a calm, collected manner (contrasted to Biden’s bombastic demeanor). Ryan had the opportunity to do that regarding Biden’s ludicrous Iran argument and didn’t do it.
To explain TOO much tunes people out and would have cut in on Biden's stringing his own noose.
Gotta know when to stop talking...and Ryan did IMO.