If you feel like the 2016 presidential campaign, starring celebrity Donald Trump, has already produced mountainous media coverage, you're right. According to a new study of network evening news campaign coverage by broadcast news monitor Andrew Tyndall, ABC, CBS, and NBC have devoted a total of 504 minutes to covering the story in 2015. At this point in the 2007 race, 462 minutes had been dedicated to the race, compared to just 277 minutes given to the contest in 2011, according to Tyndall.

To date, Republican coverage far outweighs that of the Democratic primary, 338 minutes to 128 minutes.

But what's most telling about the number crunching is how broadcast newscasts have covered Democrats Hillary Clinton and Bernie Sanders. The findings back up claims from supporters of both candidates who insist the press is a) utterly obsessed with the Clinton email story and b) not giving Sanders his due.

The Clinton campaign has received a good deal coverage this year, garnering 82 minutes in network news time. That's second only to Trump (a staggering 145 minutes), and well ahead of the next most-covered candidate, Jeb Bush (43 minutes). Here's what's so noteworthy, though: ABC, CBS, and NBC have dedicated almost the exact same amount of airtime to her campaign (82 minutes) as they have to covering the Republican-fed controversy surrounding Clinton's old secretary of state emails this year (83 minutes).

So for the network newscasts, the Clinton email story has proven to be just as important as the entirety of her campaign. Talk about newsrooms having skewed priorities. To date, the email story has produced no proof any kind of lawbreaking by Clinton, yet the network newscasts have absolutely devoured the story and turned it into one the year's big news events.  

More from Tyndall on the Clinton coverage:

CBS has found the e-mails more newsworthy than the candidacy (31 mins vs 19); NBC has focused more on the candidacy than the e-mails (42 mins vs 26); ABC has treated them roughly equally (e-mails 25 mins vs candidacy 21).

As for Sanders, his campaign has barely even registered on the broadcast evening news this year, generating just eight minutes of coverage. By comparison, Mitt Romney's decision last winter to not run for president generated just as much coverage as Sanders' entire 2015 campaign, which has been crisscrossing the country for the last four months.

Meanwhile, Sanders' coverage is getting dwarfed by Bush's, which doesn't make a lot of sense. According to the polls, Sanders is running strong in Iowa and New Hampshire and polling at approximately 25 percent nationally. By contrast, Bush is polling very poorly in the early states of Iowa and New Hampshire and is polling nationally at around ten percent. 

Obviously, with many more Republican candidates in the field it's harder to post a big national number. But still, it's hard to look at the polling data and understand why Bush has received more than five times as much network newscast coverage as Sanders.

Also, note that the Vermont Democrat's campaign has received the same amount of broadcast news time as Gov. Chris Christie, who's polling at around three percent and in seventh place among GOP candidates.

Sanders' supporters have been complaining for months about the lack of coverage the Democrat has received from the Beltway press. Back in May, I chastised the press for looking away:

In the month since he announced his bid, Sanders' coverage seems to pale in comparison to comparable Republican candidates who face an arduous task of obtaining their party's nomination. The reluctance is ironic, since the D.C. press corps for months brayed loudly about how Hillary Clinton must face a primary challenger. Now she has one and the press can barely feign interest?

As the campaign progresses, there's plenty of time for network newscasts to shift some of their relentless focus off the Republican race and do more to cover the Clinton campaign (not the partisan controversy), and give Sanders his fair share.