FILE PHOTO: U.S. Secretary of State Mike Pompeo speaks to the media at the United Nations following a Security Council meeting about the situation in Venezuela in the Manhattan borough of New York City, New York, U.S., January 26, 2019.
But, he said, "Russia is not the only nation that seeks to erode sovereignty and freedom in Europe".
He said the post-communist countries are particularly vulnerable to Chinese and Russian predatory investment and political meddling.
"We want to make sure we identify (to) them the opportunities and the risks of using that equipment", Pompeo told reporters during a visit to Budapest.
"This relationship was built on shared values and now we must sustain it on those same, especially as Russian aggression undermines freedom on this continent, but also against a China that represses people while it's expanding its influence overseas", he said.
"I think for a long time we shunned them in a way that drove them to fill the vacuum with folks who didn't share our values", he said.
Pompeo renewed a warning he delivered on Monday in Budapest that the United States may be forced to scale back certain operations in Europe and elsewhere if countries continue to do business with Chinese telecommunications company Huawei.
Orban, who has taken a hardline "zero tolerance" approach toward immigration, said the new initiatives are meant to "ensure the survival of the Hungarian nation". The warning was broad but pointedly delivered first in Hungary, a North Atlantic Treaty Organisation ally and European Union member, where Huawei is a major player.
On February 12 in Beijing, the Chinese Foreign Ministry called US warning against using Huawei equipment "groundless", as the Chinese telecom giant faces espionage fears in a growing number of countries.
Pompeo says the presence of Chinese telecom infrastructure could drive a technological wedge between the US and some allies.
"We have seen this all around the world, it also makes it more hard for America to be present", Pompeo was quoted by Reuters as saying.
Mike Pomeo, US Secretary of State, has made what could be interpreted as veiled threats against Central European countries that their use of Huawei networking equipment "makes it more hard for America to be present in those countries". But he said he had discussed "the dangers of allowing China to gain a bridgehead in Hungary" in talks with Foreign Minister Peter Szijjarto.
"The people of Europe have come to a historic crossroads", Orban said in his speech, criticizing "mixed population countries" and saying Christian majorities in some countries could soon become minorities.