Mailings the Republican National Committee sent to Montana and Missouri residents have riled officials there, prompting one House Democrat to call for an investigation into fundraising solicitations he says are designed to confuse people about the decennial census.

Styled as the “2019 Congressional District Census,” the mailing includes a questionnaire and letter from RNC Chairwoman Ronna McDaniel soliciting a donation of up to $1,000. But the mailings are likely to confuse residents before the start of next year’s census, argued Democratic Rep. William Lacy Clay of Missouri.

[Census falling further behind in hiring outreach staff]

“This is a shameful attempt to deceive and confuse my constituents for purely partisan purposes,” he said in a statement Tuesday.

Clay called for the U.S. Postal Service to investigate the mailings and said he will hold town halls in his St. Louis-area district to counter misinformation. He and other Democrats have increasingly looked outside the halls of Congress to prepare for next year’s census as they mistrust the Trump administration’s handling of the count.