Tonight on The Last Word: Mike Pence is considered a key witness in Jack Smith's probe. Also, Trump's lawyer cross-examines E. Jean Carroll. Plus, young Democrats are sparking "hope" amid GOP extremism. And young voters will be crucial for Democrats in 2024. Rep. Eric Swalwell, Barbara McQuade, Faith Gay, Adam Klaskfeld, Rep. Summer Lee, Amanda Litman and Cristina Tzintzún Ramirez join Ali Velshi.