The wonks at The Monkey Cage think Republicans have a 77 percent chance of taking the Senate in November. The wonks at The Upshot think Republicans have only a 43 percent chance of taking the Senate. The wonks at 538 seem to think it's close to a toss-up.
So I don't know what to think. I guess we'll have to wait for the actual election to happen. How very 20th century.