MADISON, Wis. (AP) -- Republican Gov. Scott Walker says he is surprised with the strong Republican turnout in Tuesday's primary election given that he faced only token opposition.

Walker told WTMJ-AM in Milwaukee on Wednesday that there was no sustained get out the vote effort for the primary, but there obviously will be one for the general election on June 5.

About 626,000 votes were cast for Walker, with his little known opponent getting nearly 20,000.

All of the Democrats collectively got about 670,000.

Walker says all the focus was on the hotly contested Democratic primary and people were telling him they didn't even know he had an opponent.

He says the strong votes for him were a good sign for the general election. Says Walker, "We cannot let up."