A fundraiser for Scott Walker’s presidential campaign called Donald Trump “DumbDumb” in a fundraising invitation and said electing the New York developer would be “a total and complete disaster for the country.”

“As you’ve seen Gov Walker is now well ahead of everyone not named DumbDumb (aka Trump) in the national polls,” wrote Walker fundraiser Gregory Slayton, a New Hampshire venture capitalist who served as consul general to Bermuda during the George W. Bush administration. “He’s also a plain spoken member of the 99% (as opposed to someone pretending to be so)…and that will be a KSF in 2016.”

(KSF is apparently a reference to the phrase “key success factor.”)

Mr. Slayton’s email invited his political network to fundraisers Wednesday in Greenwich, Conn., and at the Union League Club in New York City. His email indicated Mr. Walker will also hold “a foreign policy oriented breakfast” Thursday morning in New York.