WILMINGTON, Del. — Pres­i­dent-elect Joe Biden’s first Cab­i­net picks are com­ing Tues­day and plan­ning is under­way for a pan­dem­ic-mod­i­fied inau­gu­ra­tion in Jan­u­ary as his team moves for­ward despite road blocks from the Trump administration.

Ron Klain, Biden’s incom­ing chief of staff, offered no details Sun­days about which depart­ment heads Biden would first announce. The Asso­ci­at­ed Press has report­ed that Biden could name his nom­i­nee for sec­re­tary of state or trea­sury sec­re­tary this com­ing week.

Biden has pledged to build the most diverse gov­ern­ment in mod­ern his­to­ry, and he and his team often speak about their desire for his admin­is­tra­tion to reflect Amer­i­ca. He is being watched to see whether he will make his­to­ry by nom­i­nat­ing the first woman to lead the Pen­ta­gon, the Trea­sury Depart­ment or the Depart­ment of Vet­er­ans Affairs, or the first African Amer­i­can at the top the Defense Depart­ment, the Inte­ri­or Depart­ment or the Trea­sury Department.

Biden said last week he had set­tled on his pick for trea­sury secretary.

Klain said the Trump administration’s refusal to clear the way for Biden’s team to have access to key infor­ma­tion about agen­cies and fed­er­al dol­lars for the tran­si­tion is tak­ing its toll on plan­ning, includ­ing the Cab­i­net selec­tion process. Trump’s Gen­er­al Ser­vices Admin­is­tra­tion has yet to acknowl­edge that Biden won the elec­tion — a deter­mi­na­tion that would remove those roadblocks.

“We’re not in a posi­tion to get back­ground checks on Cab­i­net nom­i­nees. And so there are def­i­nite impacts. Those impacts esca­late every day,” Klain told ABC’s “This Week.”

Even some Repub­li­cans have bro­ken with Trump in recent days and called on him to accept the results of the election.

Sen. Lamar Alexan­der, R‑Tenn., said there was a “very good chance” Biden would be pres­i­dent and that Biden and his team should have access to rel­e­vant infor­ma­tion for the tran­si­tion. After a fed­er­al judge’s rul­ing against the Trump cam­paign in an elec­tion chal­lenge in Penn­syl­va­nia on Sat­ur­day, GOP Sen. Pat Toomey of Penn­syl­va­nia said the pres­i­dent had “exhaust­ed all plau­si­ble legal options” and Toomey con­grat­u­lat­ed Biden on his win.

And on Sun­day, for­mer Repub­li­can Gov. Chris Christie of New Jer­sey, a long­time Trump sup­port­er, said on ABC that it was time for the pres­i­dent to stop con­test­ing the out­come. Christie said Trump’s his legal team was a “nation­al embarrassment.”

Look­ing ahead to the Jan. 20 inau­gu­ra­tion, Klain said it is “def­i­nite­ly have to be changed” due to the coro­n­avirus pan­dem­ic, and that the Biden team is con­sult­ing with Demo­c­ra­t­ic lead­er­ship in the House and Sen­ate over their plans.

“They’re going to try to have an inau­gu­ra­tion that hon­ors the impor­tance and the sym­bol­ic mean­ing of the moment, but also does not result in the spread of the dis­ease. That’s our goal,” Klain said.

Inau­gu­ra­tions typ­i­cal­ly include a tra­di­tion­al parade down Penn­syl­va­nia Avenue, remarks by the pres­i­dent and vice pres­i­dent from the Capi­tol, a lunch with law­mak­ers in the Capi­tol rotun­da and numer­ous balls across Wash­ing­ton. All are events attend­ed by hun­dreds and some­times hun­dreds of thou­sands of peo­ple who trav­el to the nation’s capital.

It’s unclear how pub­lic health con­cerns will affect those traditions.

Dur­ing the cam­paign, Biden drew a con­trast with Trump on the coro­n­avirus by par­ing down his own events in response to the pan­dem­ic. Biden held small­er gath­er­ings where peo­ple were asked to wear masks and adhere to social dis­tanc­ing rec­om­men­da­tions from pub­lic health experts. Since he won the pres­i­den­cy, Biden has empha­sized the impor­tance of mask-wearing.