Liberal icon, former Rep. Barney Frank , who is dying of congestive heart failure, spoke out from hospice to deliver a stark warning to Democrats for swinging too far to the left on social issues — and said it will cost them with voters. The 86-year-old former congressman, who is famous for fighting to legalize same-sex marriage and pushing to regulate Wall Street after the 2008 financial meltdown , hopes his lefty bona fides will help his message resonate with the far left. Jake Tapper interviewed Frank on CNN, with the former Dem rep speaking from hospice care. CNN Former Rep. Barney Frank, D-Mass., attends a bill enrollment ceremony after the House passed the Respect for Marriage Act in the US Capitol on Thursday, December 8, 2022. CQ-Roll Call, Inc via Getty Images “It’s precisely because I have been on the left that I have undertaken this,” Frank told CNN’s “State of the Union” on Sunday .…