| | :Arizona, Missouri, South Carolina, Montana, South Dakota, New Hampshire, Virginia, Utah, Indiana, West Virginia, Wyoming, Kentucky, North Dakota, Nevada, and Pennsylvania (no vote in Pennsylvania). | | :Arizona, Missouri, South Carolina, Montana, South Dakota, New Hampshire, Virginia, Utah, Indiana, West Virginia, Wyoming, Kentucky, North Dakota, Nevada, and Pennsylvania (no vote in Pennsylvania). |
| | + | This was a decline in momentum from the prior year, 2014, in which three states had passed "convention of states" resolutions (Florida, Georgia, and Alaska). |