In this week’s edition of Spotlight Politics:

Starting Saturday, a policy that bans Chicago police officers from joining extremist groups takes effect.

Meanwhile, the U.S. Supreme Court took a pass on a challenge to Illinois’ assault weapons ban — the latest in a series of federal challenges.

And why it took decades to prove former Ald. Ed Burke’s corruption and abuse of power.

The WTTW News Spotlight Politics team takes on those stories and more.