Chris Cillizza, CNN Editor-at-large: With less than six weeks left before the 2018 midterm elections, I get asked -- a lot -- whether I think Republicans can hold into the House majority they won in 2014. And my general response is that Republicans have a less than 50-50 shot at holding it. But looking closely at the House map -- and the latest race ratings released Tuesday by CNN -- I feel like that calculation may be underplaying (maybe by a lot) the odds that Democrats will net the 23 seats they need to takeover the majority. Forty Republican-held seats are rated as toss-ups or worse for the party. That total includes 26 GOP seats in toss-up, 11 Republican seats leaning Democratic, two GOP seats as likely Democratic and one seat ranked as solidly Democratic.