For example, let’s say Bernie Sanders was the nominee in 2024 against Trump. A lot of people on the internet seem to like him, even some conservatives. But would liberals fall in line and vote for him enough to beat Trump?
Bernie’s supporters always seem to attack the Democrats liberal base, do you think they’d sit home if Bernie or any leftist was the nominee.
Sanders? Probably.
Someone else? Depends on their policies and what you mean by “liberals”. If you mean general center-left / Democrat base types, probably they vote for the DNC nominee. If you mean people devoted to Enlightenment Liberalism, it depends on how authoritarian the the candidate is.