Conversation so far:
what are memorable moments from rowan & martin's laugh-in?
During the September 16, 1968, episode, Richard Nixon, running for president.
what happened after that?
for a few seconds with a disbelieving vocal inflection, asking "Sock it to me?.
how was this episode received?
not doused or assaulted.
An invitation was extended to Nixon's opponent.
did he accept?
Hubert Humphrey, but he declined.

Question: what followed this incident?
Self-contained rewrite: What followed after Hubert Humphrey declined an appearance on Rowan & Martin's Laugh-In?