Democrat Randy Bryce, who's challenging House Speaker Paul Ryan Paul Davis RyanKenosha will be a good bellwether in 2020 At indoor rally, Pence says election runs through Wisconsin Juan Williams: Breaking down the debates MORE (R) for his Wisconsin seat, raised more than $100,000 in just over 24 hours after declaring his candidacy, he told The Hill Tuesday.

Bryce, a union ironworker who ran twice unsuccessfully for the state legislature, announced on Monday that he would challenge Ryan, the top congressional Republican who has represented Wisconsin's 1st District since 1999.

Bryce will face David Yankovich in the district's Democratic primary early next year. Both men backed Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) early on in the 2016 presidential campaign.

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Ryan is among the most well-connected Republicans in the country and is backed by a massive fundraising operation.

But Democrats are hoping to capitalize on President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE's low approval ratings to expand the number of Republican-held districts considered competitive.

Bryce told The Wall Street Journal earlier this month that he would seek to tie Ryan to Trump and planned to emphasize the Republicans' effort to repeal large parts of the Affordable Care Act.