Winning elections is important — therefore, advocating in favor of Republican nominees or in favor of third-party spoiler candidates that could split the vote and throw an election to our conservative opponents is never permitted on Democratic Underground. But that does not mean that DU members are required to always be completely supportive of Democrats. During the ups-and-downs of politics and policy-making, it is perfectly normal to have mixed feelings about the Democratic officials we worked hard to help elect. When we are not in the heat of election season, members are permitted to post strong criticism or disappointment with our Democratic elected officials, or to express ambivalence about voting for them. In Democratic primaries, members may support whomever they choose. But when general election season begins, DU members must support Democratic nominees (EXCEPT in rare cases where a non-Democrat is most likely to defeat the conservative alternative, or where there is no possibility of splitting the liberal vote and inadvertently throwing the election to the conservative alternative). For presidential contests, election season begins when both major-party nominees become clear. For non-presidential contests, election season begins on Labor Day. Everyone here on DU needs to work together to elect more Democrats and fewer Republicans to all levels of American government. If you are bashing, trashing, undermining, or depressing turnout for our candidates during election season, we'll assume you are rooting for the other side.

Every day social media users hide behind the safety of their keyboards and write hateful things. These comments are often so vile and cruel that it is difficult to imagine them ever being uttered to someone's face.

In an attempt to raise awareness about online bullying of women in sports, that is exactly what Just Not Sports did. In its new #MoreThanMean PSA, real men -- who were not the original authors of the messages -- read detestable tweets directed at sportswriters Julie DiCaro and espnW's Sarah Spain ... to their faces.

The men struggle with their delivery as they digest the vulgar messages, and eventually apologize on behalf of their entire gender.

A convoy of self-driving trucks recently drove across Europe and arrived at the Port of Rotterdam. No technology will automate away more jobs — or drive more economic efficiency — than the driverless truck.

Shipping a full truckload from L.A. to New York costs around $4,500 today, with labor representing 75 percent of that cost. But those labor savings aren’t the only gains to be had from the adoption of driverless trucks.

Where drivers are restricted by law from driving more than 11 hours per day without taking an 8-hour break, a driverless truck can drive nearly 24 hours per day. That means the technology would effectively double the output of the U.S. transportation network at 25 percent of the cost.

And the savings become even more significant when you account for fuel efficiency gains. The optimal cruising speed from a fuel efficiency standpoint is around 45 miles per hour, whereas truckers who are paid by the mile drive much faster. Further fuel efficiencies will be had as the self-driving fleets adopt platooning technologies, like those from Peloton Technology, allowing trucks to draft behind one another in highway trains.

Clinton’s current lead — 235 pledged delegates — is still below her post-Ohio peak. But because there are relatively few states left to vote, she now needs only 41.6 percent of the remaining pledged delegates to clinch a pledged delegate majority, her lowest figure of the campaign to date. Sanders, conversely, will need 58.4 percent of the remaining pledged delegates to win a majority.

That’s already a tall order for Sanders, but if polls and demographic projections are roughly correct in the five states set to vote today, Sanders’s math will become even more challenging, requiring him to win about 65 percent of pledged delegates in the remaining states to surpass Clinton.

Clinton has clear leads in our polling-based forecasts of Pennsylvania and Maryland, which together have 284 pledged delegates (more than New York’s 247). She also narrowly leads Sanders in our forecast of Connecticut, while trailing him by a percentage point or two in Rhode Island. We’re not running a forecast in Delaware since there’s been only one poll there, but Clinton led Sanders in that survey.

Polls are sometimes inaccurate in primaries. Michigan has been the only state in the Democratic campaign so far where the substantial majority of polls misidentified the winner, but it was such a huge miss that it needs to be kept in mind. Still, in this case, the polls don’t diverge much from what you might expect from the states based on their demographics. Furthermore, all of the states voting today except Rhode Island are holding closed primaries, another factor helping Clinton.

"We were deeply saddened to hear the news this morning of Ron Brace's death," the Patriots said in a statement. "Seven years ago tomorrow, we drafted Ron after his standout career at Boston College. During his Patriots career, the Springfield native was always eager to volunteer and give back in our communities, especially when those community initiatives were held in Western Mass. It is difficult to believe that someone so young and in the prime of his life is no longer with us. Our thoughts and prayers go out to Ron's family, friends and the many former teammates who will mourn Ron's passing."