What is the earliest the next investiture vote can be held? Do they have to wait until September or if PSOE + Podemos strike an agreement can they call one earlier since once they have an agreement they have the numbers. It seems largely egos here is the big thing standing in between one as Podemos was asking for more ministries than realistic, but PSOE saying none initially also delayed the talks and created a lot of bad will.
King Felipe can schedule a new round of talks to establish whether any candidate stands a chance of becoming the next PM any time ahead of the September 23rd deadline. Of course, the only politician who stands a chance is Sánchez, with a new investiture hearing able to set before the deadline upon confirmation that he has sufficient support to win the vote.