Sen. Ted Cruz has been speaking on the Senate floor for almost 19 hours, as of this post. The talk is not technically a filibuster -- he can't actually block the Senate from going about its business -- but symbolically, it's more or less the same thing. The point is to show one's opposition to something through a demonstration of physical will.
Which is why you can forgive conservatives for being upset with the mainstream media's coverage of the Cruz affair. When a Democrat like Texas state Sen. Wendy Davis filibusters against abortion restrictions, she is elevated to hero status, her tennis shoes become totems. When Sen. Cruz grandstands against Obamacare, he is a laughingstock in the eyes of many journalists on Twitter, an "embarrassment" in the eyes of The New York Times editorial board.
"Gee I wonder why NYT and WaPo and everyone else gave ecstatic coverage to Wendy Davis but not to Ted Cruz. I just can't make sense of it!," John Podhoretz, the conservative columnist, tweeted on Wednesday morning.