Ken Paxton and James Talarico are running in what is likely to be among the most expensive Senate races in U.S. history. Election date: Nov. 3 Mr. Paxton, the hard-right state attorney general, faces ...

Senator Susan Collins, the last Republican in New England’s congressional delegation, will test whether a G.O.P. moderate can hold ground in Maine. Election date: Nov. 3 Ms. Collins will face Troy ...