An intelligence expert's looking at Donald Trump's reputation of walking back on threats. 

An expletive laden social media post from the President over the the weekend warned Iran the US would destroy power infrastructure if it doesn't open the Strait of Hormuz by tomorrow. 

Former CIA intelligence officer, Glenn Carle, says Trump often turns up the heat with ultimatums - before turning it down again.

"I wouldn't dismiss it - obviously, he lost the attack, but I find it hard to imagine that even he would obliterate the infrastructure of the country."

LISTEN ABOVE

• 'Entire country taken out': Trump threatens 'decimation' of Iran if peace deal not struck
• Iran rejects Trump's threat of 'hell' as 'helpless and stupid'
• Trump sacks Attorney-General Pam Bondi
• 'Eyes on key targets': Trump says US 'getting very close' to finishing war with Iran
• Iran has ‘will’ to end war, president says as US weighs ground incursion
• White House says reopening Strait of Hormuz is 'not one of the US's core objectives'