Senate Finance Committee Chairman Orrin Hatch Orrin Grant HatchBottom line Bottom line Senate GOP divided over whether they'd fill Supreme Court vacancy MORE (R-Utah) on Thursday blasted the Trump administration's decision to place steel and aluminum tariffs on the European Union, Canada and Mexico, saying the financial penalties are a "tax hike on Americans."

"My position remains unchanged: Tariffs on steel and aluminum imports are a tax hike on Americans and will have damaging consequences for consumers, manufacturers and workers," Hatch said in a statement

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Commerce Secretary Wilbur Ross Wilbur Louis RossTrump admin asks Supreme Court to fast-track excluding people in U.S. illegally from census Trump 'very happy' to allow TikTok to operate in US if security concerns resolved TikTok, WeChat to be banned Sunday from US app stores MORE announced earlier Thursday that President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE has decided to slap hefty tariffs on the EU, Mexico and Canada, ending the temporary exemptions for the key trading allies despite their two months of lobbying to avoid the tariffs.

Hatch added that he would urge the administration to reverse its decision but did not specify what steps he would take to try to pressure them to do so.

"In light of the mounting evidence that these tariffs will harm Americans, I will continue to push the administration to change course," Hatch added.

Republicans, including Hatch, have publicly fretted for months over Trump's trade policies, including concerns that broad steel and aluminum tariffs would spark retaliation from other countries. Some GOP senators have floated new legislation that would give Congress more oversight of the president's trade decisions.

Sen. Pat Toomey Patrick (Pat) Joseph ToomeyAppeals court rules NSA's bulk phone data collection illegal Dunford withdraws from consideration to chair coronavirus oversight panel GOP senators push for quick, partial reopening of economy MORE (R-Pa.) separately called the tariff decision "bad news" that would "invite retaliation."

European Commission President Jean-Claude Juncker said that Trump's move leaves the EU with "no choice but to proceed with a [World Trade Organization] dispute settlement case and the imposition of additional duties on a number of US imports."

Mexico also responded to the tariffs, saying it would impose retaliatory tariffs on U.S. imports like pork bellies, apples, grapes and flat steel, among other things.

Trump first announced tariffs of 25 percent on steel and 10 percent on aluminum for national security reasons in March, later granting temporary exemptions for key allies.