Senate Minority Leader Charles Schumer (D-N.Y.) warned Wednesday that Democrats will actively try to block President Trump's pick to be the Department of Agriculture's chief scientist if Trump doesn't withdraw his nomination.

Schumer and Sen. Brian Schatz Brian Emanuel SchatzCDC causes new storm by pulling coronavirus guidance Overnight Health Care: CDC pulls revised guidance on coronavirus | Government watchdog finds supply shortages are harming US response | As virus pummels US, Europe sees its own spike Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE (D-Hawaii) said on Wednesday that the president's decision to pick Sam Clovis to be an undersecretary at the USDA sends a "clear as day message to the world that this administration continues to tolerate hate."

"President Trump should withdraw the Clovis nomination immediately — not only because he is a proud ‘skeptic’ of climate change and wildly unqualified ... but also as a gesture to the American people that this administration is serious about rooting out the most hateful voices in our society," the two Democratic senators said in a joint statement.

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They added that if the administration didn't withdraw Clovis's nomination, Democrats "will vehemently oppose his nomination and urge our colleagues from both parties to come together and summarily reject him as well.”

Democrats don't have enough votes to block Clovis's nomination on their own. He only needs a simple majority and Republicans have 52 seats, meaning three GOP senators would also need to vote against him.

The administration announced last month that it was picking Clovis, a well-known doubter of the science behind climate change, to be the USDA's undersecretary for research, education and economics.

Clovis has made a number of controversial statements in the past, including his suggestion that former President Barack Obama Barack Hussein ObamaTwitter investigating automated image previews over apparent algorithmic bias Donald Trump delivers promise for less interventions in foreign policy Rush Limbaugh encourages Senate to skip hearings for Trump's SCOTUS nominee MORE wanted to “enslave” his opponents and that Obama was happy after the 2012 terrorist attacks in Benghazi, Libya.

“The extremist views Mr. Clovis has expressed and the racist conspiracy theories he has stoked about President Obama, former Attorney General Eric Holder Eric Himpton HolderThe Hill's Campaign Report: Trump's rally risk | Biden ramps up legal team | Biden hits Trump over climate policy Biden campaign forming 'special litigation' team ahead of possible voting battle Pompeo, Engel poised for battle in contempt proceedings MORE, members of the LGBT community and others have zero place in the public discourse, much less coming from the highest levels of our government," Schumer and Schatz said in their statement.

In a 2011 blog post, Clovis ripped progressives as “liars, race traders, and race ‘traitors.’”

He also has argued that the legalization of same-sex marriage could lead to legalized pedophilia.