Following Jeb Bush’s endorsement of Senator Ted Cruz (R-TX) for President today, Mike Barnicle summarizes this stage of the 2016 election cycle: “We forget what a brutal, humiliating business it is running for this office.” Watch MSNBC’s Morning Joe conversation on former Republican presidential candidate Jeb Bush’s seemingly conflicted endorsement of Senator Cruz, especially considering Cruz’s contrasting policy and rhetoric on security and foreign relations.