absolutely outrageous to have one of the categories as red herrings... this is poor show and victoria coren-mitchell would be saddened tbh

Agree - a red herring category is weird.

Any of the herring group could be swapped, making it impossible to get the answer without a lucky guess.

A category which has it's entries fit into the others is known as a
r**-h**r**g. Would this be a good idea for an advanced wall on Only Connect or not...

No, no, no, no,no! That just makes it impossible to solve the grid! Give yourself a slap on the wrist and vow to do better next time!

All kinds of wrong

As already mentioned by several commenters, having a group whose connection is 'Red herrings for the other groups' makes this almost impossible to solve. The presidents group also feels far too specific to make it achievable. Some nice ideas, but not executed well enough to make this enjoyable.

Didn't accept correct answers. Fourth group was not a group. Very poor.

Categories, terms accepted, self-referential... none are very good, sorry.