United States President-elect Donald Trump said he expected to have most members of his Cabinet announced next week, interviewing more candidates at Trump Tower for top jobs in his administration as he prepares to take office on January 20.

Trump is still weighing who to choose as secretary of state. The Republican president-elect said on Thursday he had chosen retired Marine Corps General James Mattis as defense secretary and would make a formal announcement on that on Monday.

“We have tremendous people joining the Cabinet and beyond the Cabinet. You’ll be seeing almost all of them next week,” Republican Trump, who has never previously held public office, said in an interview that aired on Friday on Fox News.

Even without his full foreign policy team in place, Trump had more phone calls with foreign leaders, breaking tradition by speaking with Taiwanese President Tsai Ing-wen, the first such contact by a president-elect since President Jimmy Carter adopted a one-China policy in 1979.

Trump also invited Philippines leader Rodrigo Duterte to the White House next year during a “very engaging, animated” phone conversation, according to a Duterte aide. Duterte has sparred with Democratic President Barack Obama and insulted him. Obama canceled a planned meeting with him in September.

A statement issued by Trump’s transition team made no mention of an invitation.

Domestically, Trump plans to move quickly after taking office on his goals to overhaul taxation, healthcare and immigration laws, Vice President-elect Mike Pence said in an interview published by the Wall Street Journal on Friday.

Top priorities include curbing illegal immigration, abolishing and replacing President Barack Obama’s signature healthcare program, and filling a vacancy on the Supreme Court, Pence told the newspaper.

Asked what he would do on his first day in office, Trump told Fox News he may address his campaign pledge to build a wall on the southern border with Mexico, though he did not go into specifics.

“We could do the wall, we’re going to do some repealing, we’re going to do some executive orders that we think are inappropriate,” Trump told Fox, referring to the possibility of reversing executive orders issued by Obama, a Democrat, during his eight-year term.

– Reuters