The National Republican Congressional Committee hauled in $10 million in April, setting another fundraising record for the House GOP campaign arm.

It's the fourth month in a row that the NRCC has raised $10 million, which is the longest streak in the committee's history.

Speaker Paul Ryan (R-Wis.) also transferred another $2.75 million to the NRCC last month. This brings Ryan's total transfers to the committee to $20 million in 2017.

"With yet another historic fundraising month, it's clear we have the momentum to take the fight to Democrats all across the country," said NRCC Chairman Steve Stivers (R-Ohio).

"We can't take our foot off the gas pedal. Nancy Pelosi and national Democrats will stop at nothing to take back power."

The Democratic Congressional Campaign Committee has yet to announce its April fundraising haul. The DCCC raised $13 million in March.

Republicans are looking to protect their House majority in 2018. But before the cycle gets into full gear, the party is defending the vacated seats of President Trump's Cabinet members in several special elections.

Those races are being held on safe Republican turf, but Democrats are rallying their base with surprisingly strong showings from their candidates. Montana's and Georgia's special elections will provide a test before the midterms and the NRCC has poured resources into both races.

Looking ahead to 2018, recent polls show red flags for House Republicans. A survey from late April found Democrats leading by 9 points on a generic ballot, but that number surged to 16 points in a different poll last week