Missouri and Tennessee.
Alaska
Maryland and Virginia are the bordering states of Washington, D.C.
New Mexico. Mexico is a country bordering the United States and New Mexico, a state in the the United States, has the same name. The only state in the US that has the name of a country that borders the US in it is New Mexico. The other country is Mexico.
Maine only touches one state : New Hampshire
Idaho and Oregon
There aren't 4 but 6 states bordering the US. From west to east:Baja California NorteSonoraChihuahuaCoahuilaNuevo LeonTamaulipas
California, Arizona, New Mexico and Texas border Mexico on the South.
British Columbia.
Two US states have no land borders with other states : Alaska and Hawaii. The state with just one bordering state is Maine (borders New Hampshire).
There weren't any states but, we did have the original 13 colonies.
Mexico borders southwestern United States. Mexico City is the capital city of Mexico.