Here is a concise original summary based on the information published by the source. New polls suggest surprising Democratic gains in red-state Senate races PBSDemocrats in striking distance: New CNN polls in four states highlight party’s path to Senate majority CNNHere are the Senate races to watch ahead of Election Day NPRSenate What If: How the fight for Senate control could play out NBC NewsElection Forecaster Shifts 9 Senate Races as Nate Silver Touts Democratic Polling Newsweek For the full context and any later updates, use the original source link.