Donald Trump¡¯s dramatic climbdown from his ?chilling threat to wipe out Iran¡¯s civilization has exposed the limits ¡ª and the rising risks ¡ª of the U.S. president¡¯s typically unpredictable negotiating style.

His decision on Tuesday to back down and agree to a two-week ceasefire ¡ª which critics mockingly called another example of ¡°TACO,¡± or ¡°Trump always chickens out¡± ¡ª marked the biggest step so far toward de-escalating a 40-day-old war that has shaken the Middle East and disrupted global energy markets.

But Trump¡¯s claims of victory over Iran overlooked questions about the effectiveness of mixing maximalist demands, erratic rhetoric and increasingly extreme threats.