This has been a dizzying and disorienting week in international diplomacy. One with wild implications for Ukraine, the future of America’s standing in the world and President Trump’s legacy. President Trump is absolutely right in wanting to end the bloodshed in Ukraine. The suffering has been appalling and the stalemate brutal. But in the furious mix of wild opinions this week from the White House down, there are at least 10 truths which every American voter must hang onto. In Trump’s rush to end the bloodshed, these are also the truths against which any deal will be judged and will...