Senate Homeland Security Chairman Ron Johnson says he is aiming to release a status report on his investigation into Hunter Biden’s work for Ukrainian gas company Burisma Holdings “sometime this summer,” saying that the coronavirus pandemic “hampered” the probe.

“We’re in the process of writing different sections of the report that I’d like to make public sometime this summer,” Johnson (R-Wis.) told Politico in an interview Monday.

“But obviously, [the coronavirus] has not been helpful and hampered our efforts,” he added.

The Wisconsin Republican told the outlet that committee staffers have been going through documents provided by the State Department and National Archives. The National Archives’ documents include information from the Obama administration.

“I’ve got staff that have been devoted to that and they’re working on that stuff from home. We — and I — can walk and chew gum at the same time here. This is not taking up massive amounts of staff time,” he said.

Staffers are quarantining at home as the Senate remains in recess until April 20, a deadline that appears to be in flux.

During that time, the committee is unable to take multiple actions regarding the probe, including being able to subpoena Blue Star Strategies, a Democratic consultancy firm that was hired by Burisma Holdings.

In mid-March, Johnson had almost secured enough support on the committee to vote in favor of launching a probe into the younger Biden’s work in Ukraine during his father’s tenure as vice president.

The move was part of a larger Senate GOP-led effort to investigate Hunter Biden’s work in Ukraine during the time his father was vice president.

Senate Republicans argue that Joe Biden may have acted inappropriately as vice president when his son — who had no material experience for the job — was given a high-paying seat on the board of Burisma when the elder Biden was in charge of US policy toward Ukraine.

Senate Democrats, however, have argued that the investigation could aid efforts by Russians to spread disinformation and act as a smear campaign for the Democratic presidential candidate, Joe Biden.