Tonight on The Last Word: Donald Trump is barred from the Colorado ballot under the 14th Amendment. Also, the GOP plays politics with Ukraine's fight against Russia. And Texas Republicans test the limits of the state's authority on abortion rights and border security. Professor Laurence Tribe, Judge Michael Luttig, U.S. Army Col. Eugene Vindman (Ret.), U.S. Army Lt. Col. Alexander Vindman (Ret.), and Rep. Colin Allred join Ali Velshi.