Illustration: Sarah Grillo/AxiosA group of bipartisan lawmakers on Wednesday sent Meta CEO Mark Zuckerberg a letter asking the firm to delay shutting down CrowdTangle for six months.Why it matters: The lawmakers argue Meta has a responsibility to be transparent about the content being shared on its platform ahead of the 2024 election.Researchers, journalists and others use CrowdTangle to measure what's trending on Facebook and Instagram.Catch up quick: Meta, then Facebook, acquired CrowdTangle i...