A man walks past a 'Stand Up For Steel, Stand Up For America' sign while arriving at the United States Steel Corp. Clairton Plant coke manufacturing facility as emissions rise in Clairton, Pennsylvania.

One of the critical states in propelling President Donald Trump to the White House now appears to favor a Democratic Congress.

Forty-seven percent of registered voters in Pennsylvania prefer Democratic control of the legislative branch, versus 41 percent who would rather see Republicans in charge, according to an NBC News/Marist poll released Thursday. Separate questions in the survey also bode well for Democrats as they try to pick up multiple House seats from Republicans in the Keystone State.

Asked which party they are more likely to support in their district, 51 percent of registered voters responded that they would back a Democrat, while 39 percent said a Republican. Meanwhile, 55 percent of registered voters answered that they want their vote to send a message that Congress needs more Democrats to check Trump, while only 35 percent said they hope to see more Republicans to aid the president in passing his agenda.

Much can change between now and the Nov. 6 election, and the poll did not ask about preferences in specific House district races. Some Republican incumbents in Pennsylvania have also tried to build centrist brands in their districts, which may make independents or even some Democrats more likely to support them.