Kyiv, Ukraine President Volodymyr Zelensky receives me in a secure basement. It’s Wednesday, Feb. 26, two days before his White House meeting. How does he feel? “Good. But nothing is decided. I still don’t know what President Trump wants or if I will really make this trip.” Because he doesn’t trust him? Because he doesn’t believe in the goodwill of an ally who called him a “dictator”? Mr. Zelensky bursts out laughing. “No. The problem is, above all, that I don’t know why he is doing this. Doesn’t he understand that Putin is unreliable and that . . .” He hesitates. “At the same time, fortunately, there is the Senate and the House. It’s on them. I rely on their bipartisan support, and the overwhelming…