Eric Trump said Democrats know they're losing, and that's why they're desperately pursuing their "witch hunt" against his father.

Appearing on "Fox & Friends" Thursday, the Executive Vice President of The Trump Organization reacted to House Judiciary Committee Chairman Jerry Nadler (D-N.Y.) announcing a sweeping probe into "alleged obstruction of justice, public corruption, and other abuses of power by President Trump."

Nadler's committee served document requests to 81 agencies, entities and individuals, including Eric Trump.

Meantime, House Intelligence Committee Chairman Adam Schiff (D-Calif.) has vowed to continue the investigation into Trump's Russia connections and finances for as long as necessary.

President Trump has characterized the growing investigations as "presidential harassment," and a "big, fat, fishing expedition."

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Eric Trump agreed with his father's assessment, arguing that Democrats don't have a platform other than obstructing the president.

"Just imagine how productive our government could be if people actually tried to work together. And they don't want to do that. They know they're losing ... on just about every front," Trump said.

He said the Russia collusion "hoax" has fallen flat, so Democrats are attempting to "sidestep" that letdown by launching other investigations.

"All they're trying to do is get people to perjure themselves," Trump said. "It's a witch hunt and it's sad, because it hurts this country."

Watch the "Fox & Friends" interview above.

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