After Donald Trump lashed out at Senate Minority Leader Mitch McConnell and other GOP lawmakers for voting with the Democrats to pass Joe Biden’s infrastructure bill, he wasn’t quite done taking jabs at the Kentucky Senator.

Speaking to the Washington Post for a profile of McConnell that was published on Monday, Trump claimed that he did not write the foreword to McConnell’s autobiography The Long Game as he is credited with in the book. Quotes from the foreword include a description of McConnell as Trump’s “ace in the hole” and he boasts that he “couldn’t have asked for a better partner” in the nation’s capital.

If Trump didn’t write the excerpt, it makes the Senator look like he simply did a little ghostwriting on Trump’s behalf, praising himself as an ally of the president.

The relationship between Trump and McConnell has always been turbulent.

At times, when Trump was interested in doing things that McConnell prioritized, he was best friends with the president. Mitch would furiously defend Trump from the Senate floor during confirmations of Supreme Court Justices, and they each had very similar views on tax cuts.

On the other hand, Trump hates to see any kind of cooperation with Democrats and views it as a loss for Republicans. Watching the Minority Leader work in a bipartisan way on infrastructure after he struggled to do anything about it during his own presidency is especially galling for him. Coupled with the fact that McConnell was not on board with election fraud claims, and Trump has only grown more sour on him since leaving the White House.

Only of them is still in office, however.

McConnell only needs to worry about what kind of outside impediment Trump could impose on his agenda if he decides to speak out against him even more. He no longer has the power of the White House to contend with.