Steven Mnuchin, who held the post throughout Trump's first term from 2017-21, told CNBC that he sees those items as critical to the Republican's agenda.
Tax cuts are "a signature part of his program," Mnuchin said in a "Squawk Box" interview.
Also on the agenda would be tariffs, which Trump implemented on multiple items during his first term and promised to do again.
Finally, he indicated that nations such as Iran and Russia can expect to see sanctions again.
In the case of Iran, they're now selling millions of barrels of oil, which needs to be stopped," Mnuchin said.
Persons:
Donald Trump, Steven Mnuchin, Mnuchin, Trump, they're, that's
Organizations:
CNBC, Islamic Revolutionary Guard, Liberty Strategic Capital
Locations:
China, Iran, Russia