We may as well abandon the Big Easy because the White House is killing a plan to protect the city from the next Katrina. By Mike Tidwell MIKE TIDWELL is the author of "Bayou Farewell: The Rich Life and Tragic Death of Louisiana's Cajun Coast" (Pantheon, 2003). AS WE NEAR the 100-day mark since Hurricane Katrina hit, it's time we ended our national state of denial and abandon New Orleans for good. We should call it quits not because New Orleans can't be made relatively safe from hurricanes. It can be. And not because to do so is more trouble...