CNN’s June 27 presidential debate’s qualification criteria for Mr. Kennedy differ from those for President Biden and President Trump, the complaint alleges.
Mr. Kennedy took the stage a day before former President Trump will speak at a convention where Libertarians will nominate their own presidential candidate.
The political party founded by Ross Perot in 1995 draws Mr. Kennedy a step closer to getting on the ballot in all 50 states and the District of Columbia.
A day after receiving backlash over a comment that he supported abortion at full term, Mr. Kennedy said he changed his stance after listening to advisers.
Candidates must reach at least 15 percent in four national polls and appear on enough state ballot to gain 270 Electoral College votes, the rules state.