Former Lindsey Graham donor says support stopped when he didn't defend McCain from Trump

A former top donor to Sen. Lindsey GrahamLindsey Olin GrahamGOP Senate confirms Trump Supreme Court pick to succeed Ginsburg Murkowski predicts Barrett won't overturn Roe v. Wade Biden seeks to close any path for Trump win in race's final days MORE (R-S.C.) who publicly endorsed Graham’s challenger Jamie Harrison wrote Tuesday that one of the final straws for him was Graham’s failure to defend the late Sen. John McCainJohn Sidney McCainObama book excerpt: 'Hard to deny my overconfidence' during early health care discussions Mark Kelly releases Spanish ad featuring Rep. Gallego More than 300 military family members endorse Biden MORE (R-Ariz.) from attacks by President TrumpDonald John TrumpTrump admin to announce coronavirus vaccine will be covered under Medicare, Medicaid: report Election officials say they're getting suspicious emails that may be part of malicious attack on voting: report McConnell tees up Trump judicial pick following Supreme Court vote MORE.

“I asked myself, ‘What is the character of a man who will not defend his best friend? If he won’t defend John McCain, why would I expect him to defend any of us in South Carolina?’” Richard Wilkerson, the retired chairman and president of Michelin North America, wrote in an op-ed for the Greenville News.

“My conclusion was that he was more interested in currying favor than in honoring the memory of a true American hero whom he had described as his best friend," he added. "I was extremely disappointed.”

Wilkerson cites other policies and actions he said further soured him on Graham, including his support for the 2017 tax reform package and his opposition to increased unemployment benefits during the coronavirus pandemic.

“Apparently, he feels that it is OK to share government dollars with those who don’t truly need the money, but deny any small windfall to working people who have lost their jobs. These two actions tell me who is important to him, and I do not agree with his direction,” Wilkerson wrote.

Wilkerson announced his endorsement of Harrison in late April, calling him “the perfect candidate to bring together South Carolinians from all walks of life.” Wilkerson has donated to Democrats in the past, including Sen. Jeanne ShaheenCynthia (Jeanne) Jeanne ShaheenTrump makes rare campaign stops in New England in closing stretch GOP coronavirus bill blocked as deal remains elusive Justice indicts two members of ISIS 'Beatles' cell MORE (D-N.H.).

Although Graham remains the favorite in the race, his vocal backing of Trump has made him a top target for Democratic donors, and Harrison outraised Graham in the first quarter of the year.

Graham has defended his handling of Trump’s attacks on McCain, saying last year "I’m not into this idea the only way you can help honor John McCain is to trash out Trump.”