Shaheen tweeted that the photo, a horizon view from Hampton, N.H., was taken by a constituent named Chip Moynihan.
Jeanne Shaheen Jeanne Shaheen5 billion reasons Rex Tillerson is wrong Mattis's views on women in combat takes center stage Tillerson won't rule out Muslim registry MORE (@SenatorShaheen) September 18, 2012
GOP Whip Kevin McCarthy (Calif.) opted into the new design later in the day.
Twitter announced the new design function on NBC's "Today" show, so the Twitter blog points to examples of newly designed profiles at "Today" anchors' accounts like @MLauer, @SavannahGuthrie, @AlRoker, and this morning's guest anchor @RyanSeacrest.
The new option is available under design settings on individual Twitter accounts.
Updated at 3:29 p.m.