In hour two of Here & Now’s April 4, 2018 full broadcast, Russian authorities want to be part of a joint investigation into the poisoning of a former Russian spy and his daughter in the U.K. last month. We discuss with the BBC’s Anna Holligan. Also we welcome political strategists Jamal Simmons and John Brabender to discuss President Trump’s recent tweetstorm on immigration and push for new immigration legislation in Congress. And, more than 20,000 teachers from Oklahoma’s 10 largest school districts are striking for a third day. We get the latest.