While continuing to write for the Post on a freelance basis for many years, Sadler became Washington, D.C. editor of McCall's magazine in 1944 until her retirement from that position in 1971. Sadler covered the White House for both the Post and McCall's, and authored two books, America's First Ladies and Children in the White House.
She was survived in death by her husband, Richard L. Coe, theater critic emeritus for the Post.