Trump says in a tweet that the military parade featuring USA and French troops was "magnificent".
The American was the guest of honour at today's Bastille Day parade to commemorate the 100th anniversary of the United States entry into Wolrd War 1. This time, his target was the first lady of France, Mrs Brigitte Macron.
In the morning Trump visited the Necker Sick Children's hospital, meeting several patients and encouraging them with comments such as "good luck" and "stay strong".
One Twitter user wrote: "What Trump did to Brigitte Macron was textbook objectification, look at the way he gazed at her and Melania, to compare".
Following the Bastille Day parade in Paris, Mr Macron will head to the city to attend a commemoration for those who lost their lives.
"Beautiful", Trump said, turning to the first lady of France.
A total of 3,700 members of the military paraded along the Champs Elysees in Paris for the occasion.
Trump patted Macron's hand and they jerked their hands back and forth in an arm wrestling motion.
Trump has been dogged by accusations that he colluded with Russian Federation to beat Hillary Clinton in last year's United States elections. "This is probably where Macron was effective -the white knuckle handshake certainly grabbed Trump's attention".
At a North Atlantic Treaty Organisation summit in Brussels in May, Trump and Macron locked hands for so long that their knuckles started turning white.
Trump is in Paris this week on the invitation of Macron to celebrate Bastille Day, the French holiday to celebrate the day French revolutionaries stormed the Bastille to challenge to the country's royal family.
"There is no sudden and unexpected change today, otherwise we would have announced it, but there is the shared intention to continue discussing these issues", the French president added.
The two men enjoyed a "dinner between friends" on Thursday at a Michelin-starred restaurant on the Eiffel Tower.