WASHINGTON -- Attorney General Jeff Sessions is leaving open the possibility that a special counsel could be appointed to look into Clinton Foundation dealings and an Obama-era uranium deal, the Justice Department said Monday in responding to concerns from Republican lawmakers.

In a letter to the House Judiciary Committee, which is holding an oversight hearing Tuesday, the Justice Department said Sessions had directed senior federal prosecutors to "evaluate certain issues" raised by Republican lawmakers. President Trump has repeatedly called for investigations of Democrats.

"The Department's leadership has a duty to carefully evaluate the status of ongoing matters to ensure that justice is served and that the Department's communications with Congress are accurate and complete," the letter read.

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Former Justice Department officials told CBS News justice reporter Paula Reid that they believe that the move is part of a long-term strategy to discredit special counsel Robert Mueller, who was the head of the FBI at the time of the uranium deal. Mueller is investigating whether there was any collusion between Russia and the Trump campaign.

In Monday's letter, the department said the prosecutors will report to Sessions and Deputy Attorney General Rod Rosenstein and recommend whether any new investigations should be opened, whether any matters currently under investigation require additional resources and whether it might be necessary to appoint a special counsel to oversee a probe, according to a letter sent to Rep. Robert Goodlatte of Virginia, the Judiciary Committee's Republican chairman.

The letter from Assistant Attorney General Stephen Boyd did not say what specific steps might be taken by the Justice Department to address the lawmakers' concerns, or whether any of the matters Republicans have seized on might already be under investigation by federal authorities.

It did however, note that the Department's Inspector General's office was initiating a review of allegations of DOJ and FBI policy misconduct in 2016.

Any appointment of a new special counsel, particularly in response to calls from members of Congress or from Mr. Trump himself, is likely to lead to Democratic complaints about an undue political influence on a department that is supposed to function outside of any partisan sway or demand.

"As you know, consistent with longstanding policy, the Department does not ordinarily confirm or deny investigations, and this letter should not be construed to do so," the letter added.

Mr. Trump in recent weeks has repeatedly weighed in on department affairs, publicly lamenting that he does not have more direct involvement in its operations and calling on law enforcement scrutiny of Democrat Hillary Clinton, his opponent in the 2016 presidential race, and other Democrats.

He has expressed particular support for investigating the Clinton Foundation and at times has berated his attorney general and suggested his job could be in jeopardy.

"Everybody is asking why the Justice Department (and FBI) isn't looking into all of the dishonesty going on with Crooked Hillary & the Dems..." Mr. Trump tweeted earlier this month.

Everybody is asking why the Justice Department (and FBI) isn't looking into all of the dishonesty going on with Crooked Hillary & the Dems.. — Donald J. Trump (@realDonaldTrump) November 3, 2017

In apparent anticipation of those concerns, Boyd said in the letter that the Justice Department "will never evaluate any matter except on the facts and the law."

"Professionalism, integrity and public confidence in the Department's work is critical for us, and no priority is higher," he added.

Sessions said at his January confirmation hearing that he would recuse himself from any investigations involving Clinton given his role as a vocal campaign surrogate to Mr. Trump.

He similarly recused himself from the separate investigation into potential coordination between the Trump campaign and Russia, and in May, the Justice Department appointed Mueller as special counsel to lead that probe.

House Republicans in recent weeks have launched their own probes into the Obama administration and Clinton's emails.

Some lawmakers have specifically said they want to know more about whether Mr. Obama's Justice Department had been investigating the purchase of American uranium mines by a Russian-backed company in 2010.

The agreement was reached while Clinton led the State Department and some investors in the company had relationships with former President Clinton and donated large sums to the Clinton Foundation.

The letter comes one day before Sessions is to appear before the Judiciary panel for a Justice Department oversight hearing. Democrats on the committee have already signaled that they intend to press Sessions on his knowledge of contacts between Russians and aides to the Trump campaign.