US Secretary of State John Kerry is in Iraqi Kurdishtan to urged leaders not to withdraw from the political process in Baghdad.
A US State department official said the visit was "very important".
The Secretary's visit will be very important both to confer with the Kurdish leadership and also encourage them to play a very active role in this government formation process, including choosing a very strong president who can represent both Kurdish interests but also Iraqi interests.
The Foreign Secretary has been clear on the threat of Isis, but he has ruled out the prospect of any UK military involvement in the crisis.
Iraq’s foreign minister, Hoshyar Zebari, is a natural diplomat. Polite, immaculately dressed, and blessed with a great memory.
Isis has paraded military equipment in Mosul it captured from when the Iraqi army fled in what some see as a "nightmare scenario."