Bolton Finds U.N. Nomination in Jeopardy By ANNE GEARAN WASHINGTON (AP) - Withdraw or be pushed out by the White House. Survive the test of his professional life. Suffer a rejection by the Senate. That's about what it comes down to for John R. Bolton, President Bush's besieged nominee to be U.N. ambassador. Bolton could weather the indignity of further investigation into his personal and professional behavior and win confirmation by the Senate next month. He also could find his nomination scuttled. Or he could pull the plug before a scheduled May 12 vote by a Senate committee. Only a...