It has been a love-in, a bromance like no other in international diplomacy.
But no amount of hugging, kissing, wiping away dandruff or holding hands between Donald Trump and Emmanuel Macron can conceal the sharp differences between them.
The most obvious involves Iran and the nuclear deal drawn up under the Obama administration and involving easing sanctions in return for limiting Tehran's nuclear programme.
President Trump believes it is a "terrible" deal, a "ridiculous, insane" agreement - the "worst deal in history".
The American leader believes it does nothing to restrain the threat of Iran, not only from ballistic missiles but also from terrorism and Iran's activities in places like Yemen and Syria.
Mr Macron on the other hand believes it is the only option. The alternative, he believes, is a rapid slide towards war. He wants to persuade Mr Trump to stay in the deal when it is up for consideration on 12 May.
And he has a plan.
He wants to persuade President Trump to renew the existing deal when the deadline comes, and to start a new negotiation with Iran on a fresh deal that Mr Trump finds acceptable.
In the press conference on Tuesday, the American President said there was a chance he would go along with that if it was "a new deal with solid foundations".
But the possible concession came with a warning that if Iran returned to its nuclear programme and threatened the United States "it would pay a price like few other countries".