"The issue raised by Roberts' opinion is whether the federal government can coerce a state into using its federal grant money in a particular way by threatening to withhold that money. For instance, if Congress voted to defund Planned Parenthood through the Title X federal family planning program, but New York wanted to continue sending its federal Title X dollars to Planned Parenthood clinics in the state, could the government withhold all Title X money from New York?"

How about the threat to withhold federal money from Harvard force access by military recruiters?