Context : Podemos ( "we can" ) is a relatively new mainstream leftist party. There's also the traditional centre-left PSOE, traditional centre-right PP, 'new' centre-right Ciudadanos ( "citizens" ) and new far-right Vox ( projected to enter Parliament with as much as 10% of votes ), disputing this general election on a national level.

PSOE is projected to win the most votes but not a majority, Podemos would enter in a coalition government with them. Coalitions of right vs. left parties are almost equal in projected votes though, so it's anyone's guess how this will actually end, and of course there's the question of whether the far right will make it into government on a national level. They have in one of the autonomous regions, Andalusia. ( Spain is a federation in all but name. )

A few days from voting, one would expect this kind of move being done on Vox rather than any of the other four mainstream parties, given Vox's extreme right wing xenophobic rhetoric and destabilizing discourse.

Strange to say the least.