A U.S. official with knowledge of the Trump administration's efforts to combat Russia's election interference told CNN on Wednesday that getting the White House to pay attention to the efforts was like "pulling teeth."

The official, who went unnamed, told CNN that Director of National Intelligence Dan Coats Daniel (Dan) Ray CoatsFBI chief says Russia is trying to interfere in election to undermine Biden The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Trump, Biden renew push for Latino support Former Intel chief had 'deep suspicions' that Putin 'had something on Trump': book MORE feels that the White House is not being "forward-leaning enough in notifying Congress and the American people" about the need to take Russian efforts to interfere in U.S. affairs more seriously.

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The source said that officials have "spent months and months trying to sound alarm at the White House about the need to take foreign interference more seriously and elevate the issue," but have largely seen their pleas fall on deaf ears.

The source indicated that President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's National Security Council has blown off requests from the Department of Homeland Security (DHS) to meet about the issue, saying DHS kept "getting the Heisman" from national security adviser John Bolton John BoltonMaximum pressure is keeping US troops in Iraq and Syria Woodward book trails Bolton, Mary Trump in first-week sales Ex-NSC official alleges 'unprecedented' intervention by White House aides in Bolton book review MORE and his staff.

"In general, senior White House staff felt it wasn't a good idea to bring up issues related to Russia in front of the president," the unnamed official continued.

The White House did not immediately respond to The Hill's request for comment.

The official's comments come after The New York Times reported that former DHS Secretary Kirstjen Nielsen Kirstjen Michele NielsenMore than million in DHS contracts awarded to firm of acting secretary's wife: report DHS IG won't investigate after watchdog said Wolf, Cuccinelli appointments violated law Appeals court sides with Trump over drawdown of immigrant protections MORE, who recently announced her resignation, was urged not to bring up Russia-related issues with Trump during their meetings, despite Nielsen's concern about what she believed to be a key national security issue.

Acting White House chief of staff Mick Mulvaney Mick MulvaneyOn The Money: House panel pulls Powell into partisan battles | New York considers hiking taxes on the rich | Treasury: Trump's payroll tax deferral won't hurt Social Security Blockchain trade group names Mick Mulvaney to board Mick Mulvaney to start hedge fund MORE reportedly warned Nielsen that the topic “wasn’t a great subject and should be kept below [the president's] level," according to the Times.

Mulvaney told CNN that he didn't "recall anything along those lines happening in any meeting" with Nielsen.

"In fact, for the first time in history, state, local, and federal governments have coordinated in all 50 states to share intelligence, we've broadened our efforts to combat meddling by engaging the Department of Homeland Security, the Department of Justice and the FBI among others, and we have even conducted security breach training drills to ensure preparedness," Mulvaney told the network.