Enlarge / President-Elect Donald Trump and his team met with high-profile Silicon Valley execs in New York City today. Pictured are Amazon CEO Jeff Bezos, Alphabet CEO Larry Page, and Facebook COO Sheryl Sandberg alongside Trump and Vice-President-Elect Mike Pence. (credit: Getty Images | Drew Angerer)

President-elect Donald Trump held a much-publicized meeting with prominent Silicon Valley tech leaders today, including Apple CEO Tim Cook, Alphabet CEO Larry Page, Tesla CEO Elon Musk, Microsoft CEO Satya Nadella, and others. Notably absent from that list is Twitter CEO Jack Dorsey or any other personnel from the social media company, despite the fact that Trump has used his Twitter account as one of his primary communication channels with the public throughout his campaign and in the weeks since the election.

The explanation, according to a source speaking to Politico, may be vindictive—the source alleges that the Trump team didn’t invite Twitter because the social networking service refused to implement a custom “#CrookedHillary” emoji created by the campaign. Trump used this epithet to refer to Democratic presidential candidate Hillary Clinton throughout the campaign, an approach he also took with Republican primary challengers like Senators Ted Cruz (“Lyin’ Ted”) and Marco Rubio (“Little Marco”).