I believe that this represents more or less what most of the bishops presented:

http://cardinalsblog.adw.org/2016/10/practicing-faithful-citizenship/

and it seems fair and balanced. 

"Threat of excommunication and eternal damnation for voting the wrong way usually happen during other homilies" appears to be yet another unsupported assertion.

I have put a lot of time into researching it and have been unable to substantiate it.