No — reliable public sources currently do not confirm that Ed Markey is left-handed.

Edward 'Ed' J. Markey is an American politician who has served as the junior United States Senator from Massachusetts since 2013. A member of the Democratic Party, he previously served in the U.S. House of Representatives from 1976 to 2013.

Throughout his long career in Congress, Markey has been a prominent voice on environmental issues, energy policy, and telecommunications. He is known for his advocacy on climate change, consumer protection, and nuclear non-proliferation.

Born in Malden, Massachusetts, Markey earned his Bachelor of Arts from Boston College and a Juris Doctor from Boston College Law School. He served in the Massachusetts House of Representatives before being elected to the U.S. Congress.

As a senator, Markey has continued to champion progressive causes and has been involved in significant legislative efforts, including co-sponsoring the Green New Deal resolution. He remains an active and influential figure in national politics.