I got a response from a moderator which I think clears this up a little bit:
"Your post was criticizing a political figure. Commenting on a law is not necessarily "political", but expressing your opinion about specific politicians or political parties is going to attract attention - and thus encourage someone to report your post."
So it looks like you can comment about laws but they draw the line at commenting about a political figure or party.
Looks like I'm free to go start that thread about abortion!
And I freely admit my original post did specifically mention a party or person. So, my bad. At least now I know, and as they used to say at the end of after-school specials: knowing is half the battle!