Remember Spain hypocritically has two colonies in Morocco and several smaller territories, to the point that there was a military conflict between the two countries in 2002.
But Spanish government didn't. They suddenly changed its mind later. And Sanchez, a beggar chasing Biden in the halls for seconds of attention, was suddenly granted a golden ticket to play with the major leagues. Curious if we think about it. Spain received Biden and his family in Madrid in nato meetings, we started to talk more and understand us a little better.
Biden came with some previous bad experiences with Latin lobbies, mostly republicans. I think that he has lost some prejudices and seems much more comfortable with the hispanosphere currently. Sahara played a big role as turning point on that history IMAO
Which they openly did during this socialist legislature. So it's actually that Morocco has dirt on the opposition: what shady favors did they do in exchange for keeping the borders tight?