Welcome to From the Politics Desk , a daily newsletter that brings you the NBC News Politics team’s latest reporting and analysis from the White House, Capitol Hill and the campaign trail. In today’s edition, Steve Kornacki digs into why Sen. Bill Cassidy faces such a steep uphill climb in Saturday’s Louisiana primary. Plus, we lay out what you need to know before polls close in Nebraska’s primaries tonight. Sign up to receive this newsletter in your inbox every weekday here. — Adam Wollner The