One day after Ken Buck announced his retirement from Congress, citing his party’s “lying” about the 2020 election and the January 6 attack on the U.S. Capitol, the U.S. Representative from Colorado’s 4th District testified in court alongside multiple prominent election deniers and cast doubt on the findings of the congressional committee that investigated the attack. The Colorado Republican was called as a witness by former President Donald Trump’s legal team in a weeklong trial that could decide whether Trump will appear on Colorado’s 2024 presidential ballot…