Maybe I've just missed it, but I've never heard a single liberal saying they want to repeal the Second Amendment. Either they want to just pass a law and ignore the Second Amendment or they want 5 people in blacks robes to say it doesn't mean what it says.
A) They know that would arouse opposition, so do not admit it.
B) Death by a thousand cutting infringements is more effective.
Retired Supreme Court Justice Stevens Calls For Repeal Of Second Amendment
Karen Carter Peterson, chair of the Louisiana Democratic Party, has distinguished herself as the highest-profile Democrat in the country to outright call for a repeal of the Second Amendment.
https://www.theadvocate.com/baton_rouge/opinion/article_4e3c27f8-3761-11e8-89ff-8bda105787e9.html
Repealing the Second Amendment isn’t easy but it’s what March for Our Lives students need
Democrats, 39 percent, do indeed want to repeal Second Amendment
Repeal the Second Amendment
https://www.americamagazine.org/repeal-second-amendment