The longtime correspondent was immediately terminated in an email.
They argued that cancellation of the lease did not follow due process.
Candidates are seeking a U.S. Senate seat currently held by Republican Sen. Joni Ernst, who decided not to seek reelection.
Cook Political Report has shifted the race from ‘Solid R’ to ‘Likely R.’

The Republican congresswoman will face Christina Bohannan in November in the swing-prone Iowa district.
The fund, now tied up in the courts, was included in Trump’s settlement of a lawsuit with the IRS.
An open letter says many UC Berkeley students aren’t prepared for calculus, while some University of San Diego students can’t even do middle school math.
A traffic stop in a San Diego County border town led federal investigators to a sophisticated tunnel hidden inside a retail store.

Recent reports about Maine Senate candidate Graham Platner’s messages have divided Democrats days before the primary.
The journalist worked for Xinhua, China’s state-run news agency, in the United States.
The USTR also said the U.S. government would continue to ‘engage intensively’ with Brazil to address its concerns.
The tariff rate on agricultural equipment will be lowered to 15 percent.
On Friday, a federal judge in Virginia temporarily blocked disbursements from the $1.8 billion fund.
Colorado Gov. Jared Polis commuted her sentence in May.
The guidance comes amid broader debate over Nvidia chip sales to China and U.S. efforts to protect advanced semiconductor technology.
The curfew near Delaney Hall will remain in effect between 9 p.m. and 6 a.m. until further notice.
It was the seventh such strike in May.
The president revoked regulations that he described as vague, burdensome, and an obstacle to legitimate access.
State police will assume responsibility for the area outside the Delaney Hall after ICE officers agreed to stand down.
Americans declared their freedom in 1776 and ratified it in 1788. They’re still arguing about what it means.