Me thinks there's more to this.
https://www.dailymail.co.uk/news/article-9267503/Donald-Trump-dumps-Rudy-Giuliani-personal-lawyer-sued-congressman.html
Donald Trump dumps Rudy Giuliani as his personal lawyer as they are both sued by congressman | Daily Mail Online
Former New York Mayor Rudy Giuliani is no longer representing former President Donald Trump, after heading his effort to overturn the results of the elections and investigating the Bidens in Ukraine.
https://www.dailymail.co.uk/news/article-9267503/Donald-Trump-dumps-Rudy-Giuliani-personal-lawyer-sued-congressman.html