In January and February 2023, the University of Luxembourg hosted a series of four online seminars on Frank Michelman’s then just recently published book Constitutional Essentials ( CE), a book which in Frank’s own words aimed to work out the implications of Rawls' theory of political liberalism for constitutional theory and debates between constitutional lawyers regarding a number of constantly recurring questions of constitutional law. Eleven of the invited contributions to the four seminars (presentations of 15–20 minutes) plus one additional (...) contribution by Silje Langvatn, are now collected in this special issue of Philosophy & Social Criticism, followed by a response by Michelman. This introduction to the discussions between Michelman and his interlocutors begins with a brief synopsis of some of the key lines of argument that Michelman develops in CE and then moves on to survey all the arguments offered in response. The last section takes a briefly look at Michelman’s replies to these responses. (shrink)