By JASON HOROWITZ For more than a year, Prime Minister Pedro Sánchez of Spain has positioned himself as the leader of Europe’s left-wing resistance to President Donald Trump. As Trump scaled up deportations, Sánchez gave migrants a pathway to residency. As the president championed American tech companies, Sánchez sought to restrict them. And this past weekend, Sánchez refused to let American warplanes use Spain as a launchpad for strikes on Iran, leading Trump to threaten to end trade with…