What presidents normally do is work with their team to develop a policy that reflects the United States' allies, military generals and military analysis of how statements will impact the situation, she explained.
The phone call with the French President came hours after Trump spoke with Chinese President Xi Jinping.
Trump raised alarm around the world - and particularly in Asia - by warning that North Korea would face "fire and fury like the world has never seen" if it were to keep threatening the US.
The report quotes Xi as saying: "At present, the relevant parties must maintain restraint and avoid words and deeds that would exacerbate the tension on the Korean Peninsula".
The United Nations Security Council just unanimously passed new, stronger sanctions against North Korea's nuclear program.
"North Korea best not make any more threats to the United States".
Sen. Graham also said he doesn't think Trump needs congressional approval to launch a military strike against North Korea, claiming, "There's nothing in the Constitution limiting the ability to use force to protect America".
The comments came after Trump unleashed a slew of fresh threats against North Korea on Friday, declaring the US military "locked and loaded". However, the upcoming joint military exercises between Seoul and Washington, during which tensions on the Korean peninsula tend to worsen, start soon, around the 21st of August.
On Friday, the Defense Ministry said it was deploying four of Japan's surface-to-air Patriot interceptors in western Japan to respond to a possible risk of fragments falling from missiles.
This week, Trump has issued stern warnings to North Korean dictator Kim Jong Un.