LOL, politically biased teaching? J must not be getting his fair share! He will have spent 3 years in preschool, before he enters K this fall (as a 6 year old). His first 'year' was 2 days a week, for 2.5 hours, each. Not exactly rigorous by anyone's standards, I am sure. He then went to 3 days a week, again, 2.5 hours, the following year. Both of those years were less than the traditional school calendar, with a little extra at Christmas break time. They were both in a church based program. So, no politics, but some religion.
That's by your choice, which you, as a parent should have.

PC mentioned mandatory, not optional preschool. Axel was in a 1/2 day program for a year before he went to kindergarten by our CHOICE, not a mandate from a politician.