 It was somewhat unusual for Parker to be appointed to the federal bench by one President and then later promoted by a President from the opposing political party, although several other Second Circuit judges have had a similar trajectory, including Jon O. Newman, Fred I. Parker, and Sonia Sotomayor.Judge Parker assumed senior status on October 10, 2009.On July 9, 2019, Parker was part of a three-judge panel which ruled that President Donald Trump cannot block people from his Twitter account for being critical of him.