An attack on any sitting Senator should be a serious offense—Imagine if this was Chuck Shummer hit by a conservative NRA Member—? What would the media do? Go Bat Sh*t Crazy.
Assaulting, kidnapping, or assassinating the president or vice president became a federal crime after the JFK assassination.
Assaulting, kidnapping, or assassinating a member of Congress became a crime offense after the RFK assassination.
If there's physical contact, or a deadly weapon is used, or serious injury occurs, assault goes from misdemeanor to felony.