Resnick, Mike. "The Light That Blinds, the Claws That Catch"
Divergence: 1884 CE
What if: Alice Roosevelt did not die on Feb. 14, 1884.
Summary: To protect his wife's fragile health, husband Teddy lives a quiet life as a naturalist, but dreams of greater accomplishments.
Published: In Isaac Asimov's Science Fiction Magazine, July 1992; Will the Last Person to Leave the Planet Please Shut Off the Sun?, Tor 1992 (0312852762BUY), Tor/Orb 1994 (0312890109BUY); and The Other Teddy Roosevelts, q.v.