The “ Community of Christ” is an LDS offshoot; from 1871 to 2001 it was called the Reorganized Church of Jesus Christ of Latter Day Saints.
But Iowa is west of the Mississippi; if you include Boswell of SW Iowa, might as well include Ed Istook of OKC.
Looking at this map
You can see the drop off in percentage of Mormons as you move east, I guess where to put the “border” of where you might expect to find Mormon politicians is debatable.
I didn’t know there were LDS offshoots, other than the “fundamentalist” sects (nothing more than a smattering of cults and independent Mormons that aren’t officially organized) that still practice polygamy.