The Guardian view on Trump's diplomacy: when the US knows the price and ignores values

The Trump administration did not take red lines on Ukraine to its talks with Russia in Saudi Arabia on Tuesday: it cares about the bottom line. The secretary of state, Marco Rubio, underscored that when he said the two sides would create a team, not only to support Ukraine peace talks but also to explore the "incredible opportunities" to partner with Moscow geopolitically "and, frankly, economically" that might result. Kyiv and other European capitals are still reeling at the full extent of Donald Trump's cynicism when it comes to world affairs, and callous disregard for the people caught up in…