When Kansans were discussing how big of a state they wanted to be in the 1850's, there were two major groups: supporters of a Little Kansas and supporters of a Big Kansas. The Little Kansas supporters were in favor of a state of a size similar to the one that eventually achieved statehood.
The supporters of a Big Kansas, on the other hand, wanted a Kansas extending Kansas' northern and southern borders all the way to the Continental Divide. What if this group had won out? Today Kansas would also contain the most populous parts of Colorado. I'm sure there's one or two political butterflies that would occur, too...
EDIT: Minus the portion of New Mexico Territory that Colorado swiped later on.
The supporters of a Big Kansas, on the other hand, wanted a Kansas extending Kansas' northern and southern borders all the way to the Continental Divide. What if this group had won out? Today Kansas would also contain the most populous parts of Colorado. I'm sure there's one or two political butterflies that would occur, too...
EDIT: Minus the portion of New Mexico Territory that Colorado swiped later on.