Notably, local law enforcement can cooperate with ICE when undocumented immigrants are convicted of about 800 serious misdemeanors and felonies, said Louis DeSipio, a political science professor at UC Irvine who studies immigration. "ICE is also able to enter county jails to question immigrants," DeSipio said in an email.

For the full story, please visit http://www.politifact.com/california/statements/2018/mar/07/jeff-sessions/jeff-sessions-misleading-claim-california-bans-pol/.