The Cook Political Report, a nonpartisan election forecaster, shifted seven congressional races on Wednesday toward Democrats less than five weeks before the midterm elections.

Cook moved two races that were previously considered “toss-ups” to "lean Democrat."

One is the race in Kansas’s 3rd Congressional District, where Rep. Kevin Yoder Kevin Wayne YoderBottom line Amanda Adkins wins GOP primary to challenge Rep. Sharice Davids Sharice Davids to vote for Trump impeachment articles: 'The facts are uncontested' MORE (R) is facing a tough race. The National Republican Congressional Committee (NRCC) has canceled more than $1 million in advertising in the coming weeks that had been aimed at bolstering Yoder’s campaign.

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Cook also reclassified Michigan’s 11th Congressional District as “lean Democrat” after it was previously considered a “toss-up.” Incumbent Rep. David Trott (R) is not seeking reelection, setting up a race between Haley Stevens (D) and Lena Epstein (R).

The site also shifted two races that previously "leaned Republican" to "toss-up." One involves Rep. Carlos Curbelo Carlos Luis CurbeloGOP wants more vision, policy from Trump at convention Mucarsel-Powell, Giménez to battle for Florida swing district The Memo: GOP cringes at new Trump race controversy MORE's (R-Fla.) reelection bid, while the other involves Rep. Mia Love Ludmya (Mia) LoveFormer NFL player Burgess Owens wins Utah GOP primary The Hill's Campaign Report: The political heavyweights in Tuesday's primary fights The biggest political upsets of the decade MORE's (R-Utah) campaign for a third term. Both are considered young, rising stars in the GOP.

Meanwhile, Rep. John Katko John Michael KatkoThis week: House returns for pre-election sprint Hillicon Valley: Simulated cyberattack success | New bill for election security funding | Amazon could be liable for defective products Lawmakers introduce bill to help election officials address cyber vulnerabilities MORE (R) had his race moved from “likely Republican” to “lean Republican” amid a challenge from Democrat Dana Balter in New York's 24th Congressional District.

Balter recently announced that she raised more than $1.5 million in the last quarter, according to multiple reports.

Cook also shifted seats held by Reps. Justin Amash Justin AmashCentrist Democrats 'strongly considering' discharge petition on GOP PPP bill On The Trail: How Nancy Pelosi could improbably become president History is on Edward Snowden's side: Now it's time to give him a full pardon MORE (R-Mich.) and Elise Stefanik Elise Marie StefanikRepublicans cast Trump as best choice for women The Hill's Morning Report - Presented by Facebook - Pence rips Biden as radical risk GOP women offer personal testimonials on Trump MORE (R-N.Y.) from “solid Republican” to “likely Republican,” meaning that the districts could come into play in the case of massive Democratic gains in November.

We're also moving 2 other GOP seats out of solid at @CookPolitical:#MI03: Amash (R) - Solid R to Likely R#NY21: Stefanik (R) - Solid R to Likely R



Both incumbents are still heavily favored, but worth watching in a wave.

— Dave Wasserman (@Redistrict) October 3, 2018

Republicans are attempting to stave off a Democratic effort to retake control of the House and Senate in November.

Democrats need to pick up a net 23 seats in the House to reclaim the majority, and must have a net gain of two seats in the Senate to secure a majority there.

A RealClearPolitics average of generic congressional ballot polls shows Democrats with a roughly 7-point lead.