Republicans lead Democrats in a test of generic congressional matchups, a new poll found Thursday.

42 percent of likely voters said they would prefer a generic Republican candidate for Congress versus 38 percent who said they would prefer a generic Democrat, according to a Bloomberg News poll released Thursday.

16 percent said they were unsure who they'd support, while four percent were unsure.

The poll comes on the same day as a CNN/Opinion Research found that Americans are split over which party they trust more to run the legislative process, marking a slight skid for Democrats and a slight uptick for the GOP.

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40 percent of Americans said the U.S. would be better under Democratic control of Congress, while 39 percent said it would be better off under Republican control, according to a new CNN/Opinion Research poll.

16 percent said the country would do better if neither controlled Congress, while three percent said the U.S. would fare the same, and two percent had no opinion.

The tie is attributable to a drop for Democrats and a boost for Republicans.

The same poll found Democrats topping the GOP 44-34 in early August, and by a whopping 25-point margin of 56-31 in early January, before President Barack Obama took office.

Democrats still maintain a slight edge over Republicans in trustworthiness to handle the healthcare system, according to the CNN poll, though a majority said they opposed the Senate's healthcare bill, from what they'd heard about it.

43 percent of Americans trust Democrats to handle healthcare, compared to 40 percent who trust Republicans. 61 percent of those surveyed said they opposed the Senate bill, though, compared to 36 percent who said they favored it.

The CNN poll, conducted Dec. 2-3, has a three percent margin of error. The Bloomberg poll, conducted by Selzer & Company from Dec. 3-7, has a 3.1 percent margin of error.