A former senior State Department official is warning that the State Department is being "weakened" under President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE, The Los Angeles Times reported Tuesday.

Nicholas Burns, a George W. Bush-era State Department official, argued in an interview with the paper that "State and the Foreign Service are being weakened and often sidelined," despite the Trump administration's need for a strong agency to carry out the president's foreign policy agenda.

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Burns, who served under both Republican and Democratic administrations, said the president's foreign policy strategy has left the U.S. with less power on the global stage.

Trump's "policy of the last 12 months is a radical departure from every president since World War II," Burns told the newspaper.

"Trump is weak on NATO, Russia, trade, climate, diplomacy. The U.S. is declining as a global leader," he added.

Burns's remarks echo those of many top officials who warn the State Department is weakening under the leadership of Trump and Secretary of State Rex Tillerson Rex Wayne TillersonGary Cohn: 'I haven't made up my mind' on vote for president in November Kushner says 'Alice in Wonderland' describes Trump presidency: Woodward book Conspicuous by their absence from the Republican Convention MORE, who have yet to fill key posts including ambassadors and assistant secretaries, who are responsible for regional policy.

In an op-ed last week, former Obama national security adviser Susan Rice gave a stinging rebuke of Tillerson for starving "the State Department of resources, talent and relevance."

Sens. John McCain John Sidney McCainAnalysis: Biden victory, Democratic sweep would bring biggest boost to economy The Memo: Trump's strengths complicate election picture Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' MORE (R-Ariz.) and Jeanne Shaheen Cynthia (Jeanne) Jeanne ShaheenSenate Democrats introduce bill to sanction Russians over Taliban bounties Trump-backed candidate wins NH GOP Senate primary to take on Shaheen Democratic senator urges Trump to respond to Russian aggression MORE (D-N.H.) sent a letter to Tillerson in November to express concern about the adverse consequences a "weakened" State Department could have as more crises begin to unfold abroad.

“America’s diplomatic power is being weakened internally as complex, global crises are growing externally," the bipartisan duo wrote.

"These decisions ultimately will not only degrade the United States’ leadership role in the world, but will also impact our constituents who have come to rely on the Foreign Service to ... lead our diplomatic efforts to address a myriad of international challenges, including emerging nuclear crises, the threat of war and outbreaks of global pandemics,” they continued.