If By A Liberal
If by a "Liberal" they mean someone who looks ahead and not behind, someone who welcomes new ideas without rigid reactions, someone who cares about the welfare of the people - their health, their housing, their schools, their jobs, their civil rights and their civil liberties - someone who believes we can break through the stalemate and suspicions that grip us in our policies abroad, if that is what they mean by a "Liberal", then I'm proud to say I'm a "Liberal."
https://www.jfklibrary.org/archives/other-resources/john-f-kennedy-speeches/liberal-party-nomination-nyc-19600914