State of Washington: 71,300 sq miles.
All of New England (Maine, New Hampshire, Vermont, Massachusetts, Connecticut, Rhode Island) is 71,672. New Hampshire is only 9,300sq miles. At current game scale, that's not going to fit many towns, or major interstate systems. New Hampshire will essentially be the size of Seattle/Everett/Tacoma area of Washington.
At current scale, the east cost (particularly New England) won't work right.
Other states for consideration:
Delaware: 1,982 sq mi
New Jersey: 8,723 sq mi
Maryland: 12,407 sq mi
West Virginia 24,038
South Carolina 32,020 sq mi (marginal state, will be very tightly packed, or a lot of stuff overlooked)
Some of the states like New York, Pennsylvania, even Virginia will be okay... but there's at least 10 I can think of off the top of my head (the 10 states I listed above) that will be grossly distorted (or absolutely HORRIBLY represented) at the current scale.