U.S. trade representative ambassador Jamieson Greer said Sunday that President Trump and Chinese President Xi Jinping "don't have any plans" to speak amid an escalating trade war between the two countries.

"Since April 2, we have this at the leaders level, and at some point, as President Trump has pointed out, we expect that we'll be able to have a conversation with them," Greer said Sunday on "Face the Nation with Margaret Brennan."

In what Mr. Trump dubbed "Liberation Day" on April 2, the president announced that the U.S. would impose a minimum baseline of 10% tariffs on goods imported from all foreign countries, along with higher, "reciprocal" tariffs on nations that impose tariffs on U.S. exports. Then, shortly after the tariffs went into effect, Mr. Trump announced a 90-day pause on most of his new tariffs after U.S. and global financial markets plunged. At the same time, the president said he would increase the tariff rate on goods imported from China to 125%. A 20% fentanyl tariff brings Mr. Trump's universal tariffs on China to a total of 145%.

China said Friday that it would raise tariffs on U.S. goods from 84% to 125% in response, arguing in a statement that the U.S. imposition of the levies violates international economic and trade rules, while also calling the rising tariffs a "joke."

Despite questions swirling about how the lower the temperature between the two countries, Greer insisted that the president is working to reshore American manufacturing and trade as part of a broader global issue. Greer said "the only reason we're really in this position right now is because China chose to retaliate."