CNN guessing, nobody knows at this point:
“The sudden schedule change comes two days after the Pentagon deployed a carrier and a bomber task force to the Middle East, in response to “specific and credible” intelligence that suggested Iranian forces and proxies were planning to target US forces in Syria, Iraq and at sea.
The carrier group has been ordered to Strait of Hormuz in order to send a deterrent message to Iran, US officials said Sunday. The move is likely to heighten tensions as Tehran explicitly warned the US in April against any moves to block or interfere with the Strait. The 21-mile-wide waterway separates Iran from other Gulf countries and is a crucial conduit for the global economy, with 30% of the world’s crude oil passing through it.”
I’d guess you don’t need to send the Sec of State into a war zone.