Opposition to President Trump from entrenched bureaucracies throughout numerous federal agencies is one of the "main conservative arguments against big government," according to Charles Krauthammer.

Such bureaucracies, composed of civil service employees rather than government appointees that change with each new president, are alleged to be the source of critical leaks like the ones that led to the departure of former National Security Adviser Michael Flynn.

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These groups of otherwise permanent employees "develop [their] own interests," Krauthammer said on "The First 100 Days."

He explained that it is very difficult to stem ideological opposition coming from these employees who do not require Senate confirmation.

Former President Franklin D. Roosevelt, Krauthammer said, opposed government unions for that reason: bureaucrats could have the power to undermine the agenda of a sitting president.

He noted the leaks from the intelligence agencies that contributed to Flynn's ouster, as well as the Environmental Protection Agency employees that tried unsuccessfully to lobby against newly-confirmed administrator Scott Pruitt.

This is a "chronic issue," Krauthammer said, advising Trump to use the energy of a new presidency to go ahead and "attack it."

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