A Senate Committee voted Wednesday to approve the nomination of President Trump’s controversial nominee to lead the Environmental Protection Agency’s (EPA) chemical safety office.

The Senate Environment and Public Works Committee voted 11-10 to advance Michael Dourson's nomination. The vote fell along party lines, with all Republicans in favor and all Democrats opposed.

By the same 11-10 party-line vote, the panel approved William Wehrum, a lawyer for industry clients, to lead the EPA’s important air and radiation office, which oversees air pollution, climate change regulations, car pollution standards and other major programs.

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The votes send both nominees to the full Senate, where Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellGraham: GOP will confirm Trump's Supreme Court nominee before the election Trump puts Supreme Court fight at center of Ohio rally The Memo: Dems face balancing act on SCOTUS fight MORE (R-Ky.) can schedule a vote for confirmation.

Dourson is a toxicologist, and has worked for two decades at a firm he founded to conduct toxicology assessments, often for companies that make or sell chemicals.

In that role, he often came to conclusions that were far more industry-friendly than those reached by the EPA, states, universities or other researchers.

Dourson started working at the EPA as a “senior adviser” to EPA head Scott Pruitt Edward (Scott) Scott PruittJuan Williams: Swamp creature at the White House Science protections must be enforceable Conspicuous by their absence from the Republican Convention MORE last week, raising objections from Democrats.

The panel’s Democrats repeatedly ripped into Dourson and Wehrum for what they saw as clear conflicts of interest.

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“Dr. Dourson’s record is clear. Throughout much of his career, Dr. Dourson has essentially sold science to the highest bidder and recommended standards for toxic chemicals that were tens, hundreds, sometimes even thousands of times less protective than EPA’s own standards,” said Sen. Tom Carper Thomas (Tom) Richard CarperDemocrat asks for probe of EPA's use of politically appointed lawyers Overnight Energy: Study links coronavirus mortality to air pollution exposure | Low-income, minority households pay more for utilities: report OVERNIGHT ENERGY: Democrats push resolution to battle climate change, sluggish economy and racial injustice | Senators reach compromise on greenhouse gas amendment stalling energy bill | Trump courts Florida voters with offshore drilling moratorium MORE (Del.), the top Democrat on the panel.

“Can this be the best person the administration can find to entrust responsibilities of this critical leadership post? God, I hope not.”

Sen. Kamala Harris Kamala HarrisJoe Biden looks to expand election battleground into Trump country Fox's Napolitano: Supreme Court confirmation hearings will be 'World War III of political battles' Rush Limbaugh encourages Senate to skip hearings for Trump's SCOTUS nominee MORE (D-Calif.) said Dourson and Wehrum “so clearly are in conflicts of interest on the issues that they are now going to be in charge of making decisions on that will impact directly the American public.”

Democrats also lamented the approval of Dourson as a loss for last year’s bipartisan Toxic Substances Control Act (TSCA) reform, which overhauled the nation's chemical safety rules. The act got nearly unanimous approval in both chambers of Congress.

They said Dourson didn’t sufficiently show that he supports the goal of the law, named after the late Sen. Frank Lautenberg (D-N.J.).

“Mr. Dourson does not represent a person who can carry out the work of this committee in the TSCA reform legislation that we passed,” said Sen. Ben Cardin Benjamin (Ben) Louis CardinCongress must finish work on popular conservation bill before time runs out PPP application window closes after coronavirus talks deadlock Congress eyes tighter restrictions on next round of small business help MORE (D-Md.)

“I can’t believe that this would go down to a party-line vote. If it does, I think it doesn’t bode well for the bipartisan cooperation in this committee to pass legislation that would be effectively implemented in a manner in which it’s negotiated in this committee.”

Committee Chairman John Barrasso John Anthony BarrassoMurkowski: Supreme Court nominee should not be taken up before election Battle lines drawn on precedent in Supreme Court fight Sunday shows - Ruth Bader Ginsburg's death dominates MORE (R-Wyo.) spoke only briefly about the nominees at the hearing, saying they “have proven themselves to be well-qualified, experienced and dedicated public servants.”

Pruitt also thanked the panel for the vote.

"These top leaders in their fields will bring positive change to EPA’s mission to protect human health and the environment," he said in a statement. "We look forward to a full Senate vote on these highly-qualified leaders."

The committee also voted to approve Matthew Leopold to be the EPA’s general counsel and David Ross to lead its water pollution office, along with Jeffrey Baran for a new five-year term at the Nuclear Regulatory Commission. The votes for those nominees were all by voice.

This story was updated at 10:56 a.m.