Internal polling from the House Republican campaign arm finds narrow opposition to impeachment across the key districts that will determine the balance of power in the House in 2020.

The National Republican Congressional Committee (NRCC) conducted a survey of registered voters in key House battlegrounds, and found that in Democratic-held target districts, 47 percent oppose impeachment, against 44 percent who support it. In GOP-held swing districts, 49 percent oppose impeachment and 46 percent support it.

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The NRCC did not release the full polling data, but The Hill obtained a one-page summary authored by polling director Caitlin Reed.

The memo said that 63 percent of respondents believe Democrats are “obsessed” with impeaching 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 and should instead focus on issues such as lower prescription drug prices or overhauling the nation’s infrastructure.

Fifty-two percent of respondents in the contested districts believe that impeaching Trump is the top priority for congressional Democrats. That’s at odds with voter priorities, as the poll found immigration and the economy are the top concerns among respondents in those districts.

Democrats have been encouraged by early polling that has shown a shift in public opinion toward impeaching Trump after revelations he pressured the Ukrainian president to investigate former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE.

However, much of the early movement in the polls has been due to Democrats rallying behind impeachment, although there has been some movement among independents, who are largely split on the matter.

The NRCC survey found that 80 percent of Democrats support impeachment, while 51 percent of independents in the targeted districts oppose impeachment.

Democrats had been hesitant to launch an impeachment inquiry, largely because they were worried about the electoral consequences of a dramatic showdown with the White House only 13 months out from Election Day.

Republicans need to pick up 19 seats to win back the House and there are 44 “front-line” Democrats that the party considers to be the most vulnerable in 2020.

Rep. Tom Emmer Thomas (Tom) Earl EmmerHouse Democrats' campaign arm reserves .6M in ads in competitive districts The Hill's Convention Report: Trump to attack Biden at final night of convention | Speech comes amid hurricane, racial justice protests | Biden accuses Trump of 'rooting' for violence Republicans cast Trump as best choice for women MORE (R-Minn.), the chairman of the NRCC, has predicted that impeachment would cost the Democrats their majority in the House.

The online survey of 800 voters in Republican-held or NRCC target districts was conducted between Sept. 28 and Sept. 30 and has a 3.46 percentage point margin of error.