It’s politics and progressive heroes play it too, including Sanders. Have you read at all about how he benefitted from the party in his first Senate run? Bet you didn’t know that the party worked to keep him from facing real opponents, such as the former state attorney general, who would have given him a tough election. The pretense that you can take the politics out of politics is just that, a pretense, and our heroes engage in it too (I have more examples if you need them).
On the issue at hand, sorry, there is zero evidence Clinton “ordered” the press to do anything, and no journalists have said they were ordered to cover anybody. Read the Politico article Libwing linked to, it provides context. Moreover, what exactly is wrong with making things harder for your likely opponent (Jeb Bush in Hillary’s case) during a primary anyway? Is it a politics-is-icky thing? What makes it unethical? You are probably a fan of open primaries. Do you know why a lot of people and organizations, like California’s Green Party, don’t like them? Lots of opportunity for unethical behavior, right?