Sunday on CNN’s “State of the Union,” former Sen. Rick Santorum (R-PA), former Commerce Secretary Carlos Gutierrez, Democratic strategist Neera Tanden and Rep. Barbara Lee (D-CA) got into a heated exchange over the future of the Obama-era Deferred Action for Childhood Approvals (DACA) immigration policy. Exchange as follows: GUTIERREZ: The only way to discourage illegal immigration is by changing our laws. SANTORUM: Just open our borders? GUTIERREZ: Let me give you an example. SANTORUM: How many more do we need, 2 million, 3 million 5 million, 10 million? GUTIERREZ: The marketplace will tell us. We need 1 million farmers. We need 1 million farm workers in the country. SANTORUM: Give me a number. GUTIERREZ: Oh, stop it, we need 1 million farm workers in the country. SANTORUM: Give me a number. GUTIERREZ: You don’t understand how the economy works. BASH: Think the audience can hear you better if you speak one at a time. (h/t Mediaite) Follow Pam Key on Twitter @pamkeyNEN