Sen. Ben Cardin Benjamin (Ben) Louis CardinPelosi hopeful COVID-19 relief talks resume 'soon' Congress must finish work on popular conservation bill before time runs out PPP application window closes after coronavirus talks deadlock MORE (D-Md.), the top Democrat on the Senate Foreign Relations Committee, said Sunday that President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE’s withdrawal from the 2015 nuclear deal had made tensions with Iran worse.

“By pulling out of the nuclear agreement it’s the view of Europe that this is an American problem rather than an international problem,” Cardin told “Fox News Sunday” guest host John Roberts. “We isolated the United States rather than isolating Iran.”

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That isolation, Cardin said, was particularly evident in the wake of attacks on Saudi facilities, for which Tehran-backed Houthi rebels have taken credit but which Secretary of State Mike Pompeo Michael (Mike) Richard PompeoWatchdog confirms State Dept. canceled award for journalist who criticized Trump Trump's push for win with Sudan amps up pressure on Congress Putin nominated for Nobel Peace Prize MORE has blamed on Iran.

While condemning Iran as a “bad actor,” Cardin said on Sunday that “there’s really not a military solution to the problem of Iran--we need to make diplomacy work. We have to reduce where we are, where we could have this miscalculation.”

“It would be disastrous if we got into a fighting war with Iran, it would not be in our national security interests,” he added.

Foreign policy hawks such as Sen. Lindsay Graham (R-S.C.) have argued that Iran interpreted Trump's decision not to launch a retaliatory attack after Iran downed a U.S. drone earlier this year as a sign of weakness, which both Trump and Pompeo have disputed.

Trump also ordered more U.S. troops to Saudi Arabia and the United Arab Emirates on Friday, which Defense Secretary Mark Esper Mark EsperOvernight Defense: Stopgap spending measure awaits Senate vote | Trump nominates former Nunes aide for intelligence community watchdog | Trump extends ban on racial discrimination training to contractors, military Overnight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers Official: Pentagon has started 'prudent planning' for full Afghanistan withdrawal by May MORE said will “send a clear message that the United States supports our partners in the region” and “demonstrate commitment to upholding the international rules based order that we have long called on Iran to obey."