And finally, it is possible that he is right that Trump communications were under investigation — but only up to a point. We go back to a story from late October 2016 in which FBI officials allegedly investigated a connection between computer servers owned by the Trump Organization and the Russian Alpha Bank. The New York Times reported that there could be an “innocuous explanation” for 2,700 so-called look-up messages sent from Alpha servers to Trump’s. This does not necessarily mean the FBI or anyone else was “wiretapping” Trump Towers, but we have yet to find out the extent of its investigation and whether, for example, the FBI discovered additional ties between Trump associates and Kremlin allies.

Apart from the server story, news reports have suggested, as a TIME story did, that “as major banks in America stopped lending him money following his many bankruptcies, the Trump organization was forced to seek financing from non-traditional institutions. Several had direct ties to Russian financial interests in ways that have raised eyebrows.” (Trump denies he has any ties to Russia. “I can tell you, speaking for myself, I own nothing in Russia. I have no loans in Russia. I don’t have any deals in Russia,” he said recently, leaving open the possibility that he and/or his sons have ties to Russians operating outside of Russia.)

After Trump’s Twitter outburst some lawmakers, like Sen. Ben Sasse (R-Neb.), chose to take him “seriously,” that is, to call for proof of his claims. Others argued that his accusations only underscored the need for a definitive, independent investigation conducted by either a commission with subpoena power or a special prosecutor named by the deputy attorney general (Sessions, who has recused himself, could not do so). Realizing their error in inviting more scrutiny, Sean Spicer tried to walk back the allegations Sunday morning. He called for Congress — which is already investigating Trump’s Russia connection — to look into improper surveillance during the campaign. He almost begged the press to drop it, saying that no further remarks on the topic would be forthcoming. Good luck with that.

Trump inadvertently emphasized that at the core this is about whether the intelligence community has discovered the president of the United States is compromised. That cannot very well be left solely to congressional partisans or to a Justice Department that reports to him.