The Dem's had a prominent left leaning podcaster, his name was Joe Rogan, but their lack of common sense lost him. As far as Kamala is concerned, yeah her campaign didn't help her, but there is not enough lipstick at Sephora to hide that pig. She is also incapable of doing long form podcast interviews, she struggles with one or two questions. I also doubt that Rogan would have edited her answers.
Podcasts aren't the Dem's problem, nor is the syntax they use with young white males. Their problem is message and messenger. I know that liberals are creaming their pants in glee about how clever they think their TACO acronym is, but the Trump name calling isn't a real policy nor an effective approach as the last election clearly showed. If I had a slogan that the Dems should adopt it would be MANA....Make America Normal Again. They continue to choose 20% issues like men competing against women and appearing to care more for criminal illegal aliens than American citizens. Let's be perfectly honest, it shouldn't have been that hard to defeat Trump, but the DNC grossly miscalculated their ability to hide Biden's cognitive impairment and then were stuck with Harris (you know full well she wasn't their first choice, but only choice given the timing). Then she and/or the DNC doubled down on incompetence with the chucklehead Walz. The DNC's biggest FUBAR was not having real primaries. Biden implied he was going to be a one-term president, they should have held him to that.
The concept of left leaning is an interesting term given how far left the center has moved. I'd argue that 2015 Obama would be considered left leaning and and that 2000 Clinton might be considered right leaning.
One person I find intriguing as a democrat presidential candidate is Rahm Emanual. I don't think he has any of the baggage of the Biden administration and if he runs as more of a moderate he might have a chance with independents. AOC, Sanders and that ilk, are non-starters.
I'll say it again, American politics are in a race for the bottom and Dems have a huge lead.