What significant shift has occurred in US-Russian relations following Trump's phone call with Putin, and what are the potential implications?

Following a key phone call between President Trump and Vladimir Putin, there has been a dramatic transformation in how the US Administration perceives Russia's leader. As BBC Russia editor Steve Rosenberg notes, "Putin has gone from pariah to potential partner" in the eyes of the US Administration, marking a significant departure from the previous decade's approach to US-Russian relations. This shift has immediate practical implications, including Putin's invitation for Trump to visit Moscow. If such a visit occurs, it would be historically significant, as the last US president to travel to Russia was Obama in 2013. The potential meeting represents a major geopolitical realignment that could reshape international relations and have far-reaching consequences for global diplomacy, particularly regarding the ongoing situation in Ukraine.