All of SE Asia was considered.
Letting Vietnam decide for itself who it would trade with was worse than bombing it to bits. The former sets a bad example to others who may follow it's lead, the latter teaches a valuble lesson on who they shouldn't mess with and like Cuba they've never been allowed to recover, no way, thus continuing the lesson for future generations.
The rotten apple theory.
Was the US out to win it? Well I think Kennedy was, right till the end. In his last press conference, he said as much and I have no trouble believing him.
New government, new situation "and we hope [as if he didn't know] an increased effort in the war..."
Never tried to understand Johnson or Nixon and doubt I ever will.
Reporter sees "Coup" but says "Shoe"
@7:40