Senate Minority Leader Chuck Schumer (D-NY) attacked Judge Amy Coney Barrett of the U.S. Court of Appeals for the Seventh Circuit on Monday, indicating that Democrats fear her appointment could be politically problematic. Sens. Joe Donnelly (D-IN), Joe Manchin (D-WV), and Heidi Heitkamp (D-ND) are all from states that Trump won, and all are facing re-election this year. All three voted to confirm Justice Neil Gorsuch last year. Barrett is also from Indiana, the home state of Donnelly — and of Vice President Mike Pence. Sens. Susan Collins (R-ME) and Lisa Murkowsi (R-AK) are both considered moderate votes. Schumer may...