Speaker Paul Ryan Paul Davis RyanAt indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates Peterson faces fight of his career in deep-red Minnesota district MORE (R-Wis.) is headed to Georgia next week to stump for Republican Karen Handel ahead of the state's highly anticipated House special election runoff.

Ryan, who has already held a fundraiser for Handel, will travel to Sandy Springs on Monday and hold a rally at a brewery with her.

Handel, a former Georgia secretary of State, is facing Democrat Jon Ossoff in the June 20 runoff to fill the seat vacated by Tom Price, who left the House earlier this year to become secretary of Health and Human Services.

As Republicans seek to fend off a major upset in a reliably GOP district, Handel has gotten help and resources from high-profile Republicans, including from President Trump.

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While Trump was in Atlanta to deliver a speech to the National Rifle Association last month, he held a fundraiser for Handel, which netted her campaign $750,000.

The National Republican Congressional Committee and Congressional Leadership Fund, a super PAC with ties to House GOP leadership, have also spent big in the race, mostly to attack Ossoff.

Ossoff, an investigative filmmaker and former congressional aide, came in first place in the April 18 jungle primary but fell just short of the 50 percent needed to win outright. Instead, he faces Handel, the second-place finisher, in a runoff.

Since the primary, both Handel and Ossoff have hit the ground running, making it the most expensive House race in U.S. history. Recent runoff polls show the race in a dead heat.