President Donald Trump declared at the Group of Seven summit in France that his deal with Iran would bring peace and stability.
Markets cheered. European leaders applauded. The White House presented the agreement as a diplomatic triumph. History has heard this speech before.
In 1938, British Prime Minister Neville Chamberlain returned from Munich waving an agreement with Adolf Hitler and proclaiming peace had been secured. War-weary Europeans desperately wanted to believe that concessions would satisfy a dangerous regime. Chamberlain wanted to believe it, too. Of course, we know what happened next.
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Trump’s memorandum of understanding with the regime in Tehran is disturbingly familiar.
He has accepted promises in place of solutions. The deal may reduce tensions and temporarily reopen the Strait of Hormuz, but it leaves unanswered questions about Iran’s ambitions. Many prominent voices on the right have called it an American surrender.
The central problem is painfully simple: The Iranians cannot be trusted. For nearly half a century, the regime signs a pledge when convenient, delays when necessary, and violates when advantageous.
Trump appears convinced he has found a different outcome. If history is any guide, the odds strongly favor the opposite conclusion.
That reality creates an extraordinary dilemma for Secretary of State Marco Rubio.
If Rubio harbors serious doubts about the wisdom of trusting Tehran, he has an ethical, moral, and political obligation to resign. Yes, Rubio should resign if he does not fully support the deal.
Not because resignation is politically convenient. Not because it would instantly elevate his standing among Republican voters. But because some moments demand principle over position.
The Iran agreement is one of those moments.
For most of the period since Trump’s win in 2024, Vice President JD Vance appeared to possess a virtual lock on winning the 2028 Republican nomination to succeed Trump. It wasn’t even going to be a contest. He enjoyed the de facto incumbency and the widespread assumption that he would inherit the Trump coalition.
That assumption looks increasingly shaky.
Recent polling suggests that Rubio is no longer a distant challenger, but a serious contender. What once appeared to be a Vance coronation is beginning to resemble a competitive campaign, assuming the Republican National Committee and its 56 state and territory parties run a free and fair contest.
Trump’s Iran deal could well become the defining issue separating Vance and Rubio since the vice president has emerged as its chief proponent.
If the deal ultimately collapses, ownership of the failure will not belong solely to Trump. It will belong to Vance as well.
Rubio has an opportunity to draw a bright line. Imagine the contrast in 2028.
Vance would be defending a policy that trusted Tehran and failed. Rubio would be the statesman who warned against appeasement and sacrificed one of the most prestigious positions in government rather than lend his name to a dangerous illusion fueled by Trump’s obsession with brokering peace deals.
For Rubio, it’s about putting conviction above career advancement.
Of course, all of this depends on one crucial assumption: that the Iranian regime behaves as the Iranian regime has always behaved.
That is not much of a gamble.
Trump may genuinely believe he has secured peace. Chamberlain sincerely believed the same thing.
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If this agreement eventually proves to be a repeat of Munich, Republicans will begin searching for the leader who saw the danger before everyone else.
Rubio should make sure that leader is Rubio.
Dennis Lennox is a political commentator and public affairs consultant. Follow @dennislennox on X.