Opinion | Wednesday, April 29, 2015 | THOMAS B. EDSALL Enter Scott Walker, Stage Right In his nascent presidential campaign, the Wisconsin governor wants to position himself as a deeply conservative alternative to Jeb Bush and Marco Rubio. | | Op-Ed Contributor From Saigon to America By BICH MINH NGUYEN They gathered us up. They filled a knapsack with clothes and food. And then we left our home for good. | | Opinion on Facebook » Connect with columnists, readers and influential thinkers. Join the conversation around the day's biggest issues. | Nicholas Kristof's Newsletter Sign up to subscribe to receive emails from Nicholas Kristof about each column and other occasional commentary. | | |