House Democrats facing reelection in 2020 are being urged to keep their language on impeachment simple and direct, according to a memo from Rep. Cheri Bustos Cheryl (Cheri) Lea BustosThe Hill's Campaign Report: Biden asks if public can trust vaccine from Trump ahead of Election Day | Oklahoma health officials raised red flags before Trump rally DCCC dropping million on voter education program Clark rolls out endorsements in assistant Speaker race MORE (D-Ill.), who heads the Democratic Congressional Campaign Committee.

In the memo obtained by The Hill, Bustos told her colleagues to keep their "language simple, direct and values-based" if asked about 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 actions and impeachment. The chairwoman also said that House Democrats need to drive home the message that "no one is above the law."

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The memo pointed to polling that showed voters are finding Democratic messaging to be more convincing than Republicans' on impeachment.

Fifty-four percent of those surveyed said they found the Democrats' message saying Trump is abusing his authority to be convincing, including 42 percent who said it was a very convincing argument.

Just 44 percent of respondents said they found Republicans' messaging that "the Ukraine issue is just another witch hunt" to be convincing, with 34 percent of that total finding it was very convincing.

The poll was conducted by the Democratic firm ALG Research.

House Democrats have been grappling with how to address the issue of impeachment, worried it could hurt candidates running in swing districts.