Alaska has two rocket launch ports. One is in Fairbanks, although that is used mostly for auroral sounding rockets. The other is in Kodiak, I think, and could be used for polar orbit launches as well as ABM tests. There would be no advantage in polar launches by using an equatorial site versus an Alaskan site.
Except that a private company trying to conserve capital could be able to launch satellites in any orbit from one site at no additional cost.