last game I played I built FOGNA (im not 100% sure about its name), which allow you store at the end of turn in the stockpile the card you just played to follow or lead. Can I play 3 cards as senator and store them in the stockpile with this building??
The English name of the card is Sewers. Yes, you can play a petition (3 cards of the same colour as wild card) and put it in the stockpile at the end of your turn. At least it's how I've been taught the game. Have fun!