PHOENIX - A Republican state lawmaker is opposing U.S. Senate Republicans' plan to repeal and replace Obamacare, out of concern for the damage the plan would do to Arizona's Medicaid program.

On this weekend's "Sunday Square Off," I discuss the Senate GOP plan's potential impact on Arizona with State Rep. Heather Carter of Cave Creek, chairwoman of the House Health Committee, and Jennifer Mellor, vice president of economic development with the Greater Phoenix Chamber of Commerce.

Carter was one of the so-called "Medicaid Republicans" who joined Democrats and GOP Gov. Jan Brewer in 2013 to accept Obama Adminstration money to expand Medicaid health insurance in Arizona. I ask Carter whether her Republican colleagues were right in opposing the expansion.

Also on "Square Off":

New threat to Dreamers: Immigration attorney Ray Ybarra Maldonado discusses why a Texas lawsuit could force the Trump Administration to shut down the DACA program for Dreamers, and how ICE is now targeting all undocumented immigrants for deportation, not just those who've committed crimes.

Talk of treason: Jeremy Duda, author of a book about the history of treason in America, discusses whether Donald Trump Jr. has done anything that borders on treason.

"Sunday Square Off" airs at 8 a.m. Sundays on 12 News, after "Meet the Press."