Sen. Bob Menendez under federal investigation

The feds are taking a second look at Sen. Robert “Bob” Menendez five years after an initial corruption investigation ended in a mistrial.

Michael Soliman, an adviser to the powerful chairman of the Senate Foreign Relations Committee, told The Post Wednesday that Menendez (D-NJ) “is aware of an investigation,” but “does not know the scope.”

“As always, should any official inquiries be made, the senator is available to provide any assistance that is requested of him or his office,” he added.

The investigation was first reported by Semafor. According to the outlet, Manhattan federal prosecutors have contacted people connected to Menendez and sent at least one subpoena in the case.

Menendez, 68, was indicted in 2015 after prosecutors from the Justice Department’s Public Integrity Unit accused him of accepting lavish bribes from Palm Beach ophthalmologist Dr. Salomon Melgen.

Investigators alleged that Menendez received hefty political donations and enjoyed free private jets and luxury vacations in exchange for helping Melgen secure lucrative government contracts, as well as visas for the doc’s three foreign girlfriends.

Sens. Cory Booker (D-NJ) and Lindsay Graham (R-SC) testified on Menendez’s behalf during the lengthy proceedings, which ultimately ended in the mistrial in November 2017. Prosecutors officially dropped the case in 2018.

Melgen was convicted of Medicare fraud in 2017, and was pardoned by outgoing President Donald Trump in 2021.