On the menu today: If you’re a Democrat, the two things that are spoiling your otherwise ebullient mood this morning are the thought that Michelle Obama and Barack Obama could have and should have started their grand-slam speeches earlier in the evening, and the realization that Tim Walz (tonight) and Kamala Harris (Thursday) will almost certainly not be as good as either Obama in their convention addresses. Meanwhile, Vermont senator Bernie Sanders and Illinois governor J. B. Pritzker make a...