Hillary should just go home and play with the grandchildren until Labor Day.

[Bernardo de La Paz]

9. Yes. Dukakis had about a 17 point lead just after the D convention (or possibly just before).

GHW Bush then had a good convention and went on the attack, attacks that weren't answered.

https://en.wikipedia.org/wiki/Michael_Dukakis#1988_presidential_campaign

Dukakis himself blames his defeat on the time he spent doing gubernatorial work in Massachusetts during the few weeks following the Democratic Convention. Many believed he should have been campaigning across the country. During this time, his 17-point lead in opinion polls completely disappeared, as his lack of visibility allowed Bush to define the issues of the campaign. Dukakis has since stated that the main reason he lost was his decision "not to respond to the Bush attack campaign, and in retrospect it was a pretty dumb decision."