On Election Day, the media always shows the percentage of the poular vote total for each candidate. That is what everyone talks about. On other days people talk about delegates, but in all my years watching the election results I never heard news reporters mention delegates. This is the first year I started to pay any attention to the delegate total in each state.
I can't help what you pay attention to. As is the case in every primary and caucus, the delegates were reported in Iowa and NH. That has been the case in every primary and election as long as there has been television coverage.
In fact, until THIS year, the Democratic Party of Iowa
has NEVER, EVER reported/released the popular vote. The change this year was made based on one of requests that Sanders mad after the 2016 caucuses.
With regard to March third, apparently you think that the media will add together all the popular vote from all the states and report it. That is very unlikely to be the case. The media will DEFINITELY report the total number delegates won by each candidate, as they have in every election.
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This is easy enough to check. Just hit a couple of weeks.
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And just BTW, in the national election, the total popular vote is reported, but the focus is on delegates (called electors) to the Electoral College. Few paid attention to the total popular vote, until after the election was decided and the Clinton folks decided to make a big deal of the popular vote. Of course, if the election were based on the popular vote, no one knows what the result would have been, since the campaigns would have been much different.