Pence on Thursday denounced a new initiative by France, Germany and Britain to let European businesses keep operating in Iran despite renewed US sanctions created to hamstring Iran's nuclear weapons ambitions.
"Sadly, some of our leading European partners have not been almost as cooperative".
Pence told an global conference on the Middle East that is being held in Warsaw that "some" of Washington's "leading European partners" have not been cooperative when it comes to confronting Iran.
He called it an attempt to "break the American sanctions" against Iran.
The Warsaw meeting was attended by more than 60 nations but major European powers such as Germany and France, part to the 2015 nuclear accord, refused to send their top diplomats. Secretary of State Mike Pompeo announced the summit last month in Cairo, indicating the administration could seek to renegotiate the deal, however, without Iran's presence. He, like other Saudi leaders of late, indicated that he was looking forward to a future in which Israel and the Arab world work together: "With Israeli money and Saudi brains, we can go far".
Citing a list of regional challenges ranging from Iran, Syria, and Yemen to the peace process between Israel and the Palestinians, Pompeo said, "No one country will dominate the discussion today nor will any one issue dominate our talks". "Going to back to your question on specifically what we should do, I think we should start something, and Warsaw is a great place to start". "It is cold in Warsaw right now but Israel's foreign relations are warming up, warming up for the better".
But just as notable were the absences, not only of Iran itself, which called the meeting a "desperate circus", but of the Palestinians, who refused to attend over what they regard as U.S. bias against them under Trump.
The conference is widely viewed as a US-led effort to isolate Tehran, a foreign policy priority of the Trump administration.
The European allies of Washington have voiced concern that the conference would turn into an Iran-bashing session and increase tensions with Tehran.
On Wednesday, Israeli Prime Minister Benjamin Netanyahu held a very productive meeting in Warsaw, Poland, with Omani Foreign Minister Yusuf bin Alawi bin Abdullah.
Also casting a cloud over the Warsaw talks, a suicide auto bombing in southeastern Iran on Wednesday killed 27 troops of the elite Revolutionary Guards who were returning from patrol, according to the force. Iran, which is this week celebrating the 40th anniversary of its Islamic Revolution, denounced the meeting as a "circus" aimed at "demonizing" it. Several other Arab states, particularly those around the Persian Gulf, do not readily advertise to their citizens the friendly diplomacy that already exists with Israel.
On the northern front, Israel is working to oust Iran from Syria, Netanyahu said.