I am an only child, so I don’t have any experience with siblings. But on Monday, the Ivy League’s academic big brother, Harvard University, did what I expect any parent would want an older sibling to do. They set an example. Just before spring break, I wrote urging the Cornell administration to work with the rest of the Ivy League and other schools in challenging the actions of the Trump administration. Since then, Cornell has seen $1 billion in funding frozen by the federal government.  What schools like Cornell need is substantive messaging that takes a firm, public stance against the threats to academic freedom. One way Trump’s populism mobilizes…