The fate of billions in assistance for Ukraine remains in limbo Monday morning even as President Volodymyr Zelensky is expected to make a crucial pitch to senators and House Speaker Mike Johnson on Tuesday.Zelensky’s visit to Washington – his third since Russia invaded Ukraine in 2022 – is unlikely to shift a now cemented dynamic in Washington that Republicans, even those that back additional funding for Ukraine, aren’t willing to do more unless Democrats and the White House concede on major policy changes on the US southern border.It’s a complicated moment for the White House, which has made the case...