Four Senate races remain tight in sprint to Election Day, polls show

Senate races in four states are neck-and-neck in polls released Monday that show the battle for the chamber will come down to the wire.

The New York Times and Siena College polls said Sen. Catherine Cortez Masto is deadlocked with Republican Adam Laxalt at 47% in Nevada, while Sen. Raphael Warnock holds a 49%-46%, lead over Republican Herschel Walker in Georgia.

Democratic leaders have fretted about squandering a winnable race against Mr. Walker, a football legend who has no political experience.

In places where Democrats want to flip seats, the NYT-Siena polls found...