The White House on Monday blamed Iranian President Hassan Rouhani for inciting a war of words with President Donald Trump, who warned that verbal threats could escalate into military conflict with the U.S.

White House press secretary Sarah Huckabee Sanders is holding a briefing at 2 p.m. EDT today. Watch her remarks in the player above.

Trump, who campaigned on a promise to bring a more hawkish approach to Iran, sent an all-caps tweet late Sunday warning of dire consequences for the longtime foe. “NEVER EVER THREATEN THE UNITED STATES AGAIN OR YOU WILL SUFFER CONSEQUENCES THE LIKE OF WHICH FEW THROUGHOUT HISTORY HAVE EVER SUFFERED BEFORE,” he wrote.

Read more at PBS.