Mirror, Mirror...

I was born and raised in Massachusetts (postal abbreviation MA), and now live in Washington (postal abbreviation WA).

Flip and M upside down and you get a W.

MA: East coast state with a liberal urban east and a (fairly) conservative rural west.
WA: West coast state with a liberal urban west and a (fairly) conservative rural east.

Both states have their largest city wrapped around a seaport. Both states almost invariably vote democrat for president.

Furthering the "mirror image" idea: MA has high income tax. WA has no income tax. Seven states (including WA) in the US have no income tax. Seven states (including MA) in the US have a flat income tax.

The next state east of MA (NY) is shaped kindof like a backwards "L".
The next state west of WA (ID) is shaped kindof like a forwards "L".

Both MA and WA have about 6.5 million (+/- 100,000) people.

Both MA and WA have double "8's" in their year of admission to the US (MA 1788, WA 1889).

Both the US Senators from MA are male democrats, and it has a male democrat governor.
Both the US Senators from WA are female democrats, and it has a female democrat governor.

WA is the leading producer of rasberries in the US.
MA is the 2nd leading producer of cranberries in the US.

MA has the busiest light-rail system in the country.
WA has the largest ferry system in the country.