Make no mistake: the Saturday-morning tweet sent out by President Trump alleging tapping of phones in Trump Tower has changed the political calculus on both sides. The mainstream media obsessively call his charge "unsupported" by evidence and denigrate it as imprecise and incomplete. Yet, as Andrew McCarthy – a former assistant U.S. attorney – explains in National Review , "While You Weren't Looking, the Democrat-Media Election-Hacking Narrative Just Collapsed."

... [a] third prong, without the support of which the stool would collapse: the impression that the FBI has been feverishly investigating what is said to be the Trump campaign's collusion in what is said to be the Russian hacking of the election. This reporting is designed to get you saying to yourself: "Why would there be such a zealous investigation by FBI agents – in addition to several other intelligence and law-enforcement agents – unless there really were grave reasons to believe the shocking election-hacking conspiracy narrative?" Thus, details about investigative activity have been leaked to the media. The press and the Democrats then exploit the leaks to spin the "Trump complicity in Russian election-hacking" story. It seems not to matter how objectively ill-conceived the Russian election-hacking claim is, or how woefully insufficient the purported Trump–Russia ties are to support an inference of campaign collusion in the hacking. The specter of an investigation – breathless media reports of FISA court applications, wiretaps, surveillance of agents of a foreign power, and mysterious servers; painstaking analysis of shady financial transactions involving Russian banks and funding streams – seems to make the outlandish conspiracy impossible to dismiss out of hand.

By his tweet, President Trump forced the purveyors of this narrative to fiercely deny that any wiretapping took place at Trump Tower. It is a no-win situation for the president's enemies: either they repudiate their narrative of the last several months about Russia or they admit that under President Obama, a spying effort was launched against the candidate of the opposition party.

Once again, Donald Trump is playing Road Runner to the Dem-media establishment's Wile E. Coyote. His "rash" and "unsupported" tweet has decisively changed the game.

Reader David R. Zukerman calls our attention to an exchange on Fox News Sunday that may hint at panic spreading among the Obama insiders: