Wisconsin Democrats crowd in for chance to challenge Walker

MADISON, Wis. (AP) — Wisconsin Republican Gov. Scott Walker has been warning for months about a "blue wave" coming this fall, but so many Democrats are eager to ride it that it's a struggle for any dominant challenger to emerge.

Eight Democrats are taking on Walker in Tuesday's primary as he seeks a third term.

State schools chief Tony Evers enters the primary as the best-known Democrat. Though he leads in polls, many voters are undecided. Some challengers are counting on a surge from younger voters to help them topple the 66-year-old Evers.

Republicans will choose between state Sen. Leah Vukmir and newcomer Kevin Nicholson in a U.S. Senate primary. The winner takes on Democratic incumbent Sen. Tammy Baldwin.

There are also primaries in the race to replace retiring House Speaker Paul Ryan.