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There are some members of Congress who have famously struggled to understand the online world. Sen. Ed Markey (D-Mass.) prides himself on not only understanding the internet, but also for passing some of the key legislation that he likes to say helped lay the foundation for the digital revolution.\nMore recently, Markey has been leading fights to enhance online privacy and regulate social media. So when Elon Musk took over Twitter recently, Markey was paying close attention to see what kinds of changes the richest man in the world might bring to the platform.\xa0\nThe two men have a little history: they previously tussled over safety issues with self-driving technology in Musk\u2019s Tesla electric vehicles. The Muskification of Twitter was equally concerning to the senator. But it was when Musk unveiled a plan to sell blue check marks \u2014 the Twitter verification symbol that prevents users from masquerading as other people and corporations \u2014 that Markey started to get really worried. What followed turned Markey into Musk\u2019s chief tormentor in Washington.\xa0In this week\u2019s Playbook Deep Dive, host and Playbook co-author Ryan Lizza went up to Sen. Markey\u2019s office on Capitol Hill to find out what it\u2019s like to be in a Twitter war with the self described chief twit, and what might come next in this escalating confrontation.\xa0\xa0\nRyan Lizza is a Playbook co-author for POLITICO.Senator Ed Markey is a Democratic senator from Massachusetts.Afra Abdullah is associate producer for POLITICO audio.Kara Tabor is a producer for POLITICO audio.Brook Hayes is senior editor for POLITICO audio.Adam Allington is senior producer for POLITICO audio.Jenny Ament is executive producer for POLITICO audio.\n\nLearn more about your ad choices. Visit megaphone.fm/adchoices