After Donald Trump was elected president, it was only a matter of time before he would be in the White House and change the direction of American foreign policy. Just hours after National Security Advisor Michael Flynn sent a strong warning to Iran, Trump decided to add his thoughts on Twitter.

Trump on Twitter

In a surprising move, Michael Flynn appeared along side White House Press Secretary Sean Spicer during his daily briefing on Wednesday morning. During the press conference, Flynn criticized Iran's recent ballistic missile testing launch, referring to it as a breach in violation of a United Nations Security Council resolution.

In addition, Flynn also hit back at Iran for backing Houti rebels in Yemen, who have been attacking U.S. allies, including Saudi Arabia. "As of today," Flynn said, "we are officially putting Iran on notice." As seen on Twitter on February 1, Donald Trump has decided to also chime in.

"Iran is rapidly taking over more and more of Iraq even after the U.S. has squandered three trillion dollars there," Donald Trump wrote on Twitter late Wednesday night, before also adding, "Obvious long ago!" Trump's strong language is in line with his message during the campaign, where he referred to the recent Iran deal signed by former President Barack Obama as "one of the worst deals of all time."

In response, Iran's foreign ministry has pushed back against the Trump administration, defending their recent missile test as being "solely for defensive purposes." With the recent "Muslim ban" executive order signed by Donald Trump, tension between the United States and the Middle East is only expected to increase.

Over the weekend, Iran announced that they would stop using the U.S. dollar in response to the aforementioned "Muslim ban."

Next up

With just a week and a half under his belt as the commander in chief, Donald Trump is already making big changes in how the United States does business. While it's unknown what the future will hold in regards to the Trump administration and foreign nations, it's expected that critics will continue to hold the president's feet to the fire.