MADISON, Wis. (AP) — Groups seeking to recall Republican Gov. Scott Walker submitted nearly twice as many signatures Tuesday as required to force an election, an overwhelming number that may make a vote later this year inevitable.

But Walker's opponents still must transform public outrage over his pushback against unions into actual votes to oust him from office. If Walker is worried, he's not showing it: As petitions were delivered to election officials, Walker was out of state raising money to defend himself and the agenda that has made him a national conservative hero.

Read more: Walker Opponents To Submit More Than A Million Recall Petitions

MADISON, Wis. (AP) — Supporters of a push to oust Wisconsin Gov. Scott Walker from office are prepared to declare victory in their effort to force the Republican into a recall election. But a problem looms for Democrats: They still don't know who would run against him.

Recall organizers say they have gathered far more than the 540,208 signatures required to force the election against both Walker and GOP Lt. Gov. Rebecca Kleefisch, and will submit their petitions Tuesday.

Walker has meanwhile dominated the state's airwaves with ads defending his agenda, including the law enacted last year that ended nearly all collective bargaining rights for most public workers and spurred the recall effort in the first place.

Read more: Wis. Democrats Still Searching For Walker Opponent