Republican nominee Mitt Romney says he won’t be attending Donald Trump’s nominating convention in July.

“Mitt Romney, the 2012 Republican presidential nominee, plans to skip this summer’s Republican National Convention in Cleveland where Donald Trump will be officially nominated — an unusual move that underscores the deep unease many Republican leaders have about the brash celebrity mogul as their standard bearer,” the Post reports, adding that a Romney staffer said, “Governor Romney has no plans to attend convention.”