Yes, in local elections. No, in national elections. Even if everyone dropped the DNC and voted a third party into the Presidential office, third parties don’t just appear as permanent major contenders due to winning one election. Not to mention the congressional support they’d need to pass anything. You sound kinda like me when I was younger, so I really do hope you’re trolling so you can avoid the sudden realization of what exactly you’re suggesting. Splitting the vote is a real thing that can happen if a majority faction schisms into two minority factions. Unless you’re absolutely positive that whatever third party is already going to get more votes than Harris, voting third party is splitting the progressive vote. If you want to establish a third party, go out into your county and campaign for one at a local level. Get a regional voter base and work toward a congressional campaign. Seriously, nobody’s stopping you. I would love to see people doing that. But please don’t pretend this pipe dream of electing a third party straight to the highest office in the land (with no legislative or judicial support) is the answer to the future.