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WATCH: Why Ted Cruz is turning into a 'total train wreck'

Republican freshman Sen. Ted Cruz and his staff have drawn a line in the sand for fellow party members when it comes to the president's health care law.

Republican freshman Sen. Ted Cruz and his staff have drawn a line in the sand for fellow party members when it comes to the president's health care law.Cruz, who is in favor of shutting down the government in order to defund Obamacare, has gone after senators like Tom Coburn and Mitch McConnell, saying they serve in the "surrender caucus" because they don't stand with Cruz as well as Marco Rubio and Mike Lee on the issue.Coburn has publicly stated his wish to kill the Affordable Care Act, but the Oklahoma Republican, who is a medical doctor, said he's unwilling to risk a government shutdown in order to accomplish that."I want to defund this bill, but I also want a way to do it that kills it," said.On Wednesday morning, Morning Joe host Joe Scarborough said Cruz's attacks are misguided:

“Have you seen what Ted Cruz is doing? He’s going crazy on Republicans…Ted Cruz is attacking anybody that is not willing to shut down the government over Obamacare…I have to be very careful about what I say, but Ted Cruz comes in, obviously so completely ignorant about the war that Tom Coburn has been fighting for 20 years. And to say something like this about Tom Coburn. Ted Cruz is a total train wreck. He is comparing Mitch McConnell to Barack Obama. He is attacking Tom Coburn as being a member of the 'surrender caucus' when Tom Coburn, and yes Ted Cruz…I…put our political lives on the line more times in six months than Ted Cruz will put on the line his entire lifetime."