Sergei and action cards.

Coyote wrote:

I have a discussion.

Can Sergei discard an ally, retainer, equip or political card when he blocks?

Are ally cards, equip cards, retainers cards and political cards also action cards?

Yes. They even have the ACTION icon.

From the rulebook:
"Ready minions can also use actions to bring different types of permanent resources into play. These three actions are very similar, although the cards they bring into play are not:

Equipment: such as computers, guns, and exotic artefacts. An equipment card is brought into play with an equip action. Equipment can also be moved from one minion to another by performing an action.

Retainers: henchmen, attendants, or animals commanded into the service of the minion. A retainer is brought into play with the employ retainer action. Retainers cannot be moved from one minion to another.

Allies: non-vampire minions, such as mages, werewolves, or ordinary mortals. An ally is brought into play with the recruit ally action."

Coyote wrote:

Does this has changed in the past and in previous rules they weren't actions?

No, it has never changed.