In this June 28, 2013 file photo, Wisconsin Gov. Scott Walker speaks in his Capitol office in Madison, Wis. (AP Photo/Scott Bauer, File)

Wisconsin Gov. Scott Walker (R) has been an outspoken opponent of Obamacare, challenging its constitutionality in court and rejecting federal funds to expand Medicaid under the program. But that doesn't mean he backs the current House GOP strategy to risk shutting down the government over the issue.

In an interview Friday, Walker said he has proven his commitment to standing in the way of the Affordable Care Act's implementation, having "done just about anything possible to alter that course."