Washington (CNN) - Republican presidential candidate Newt Gingrich's criticism of the House GOP plan for Medicare reform has opened a hornet's nest inside the party, but at least two influential Republicans are steering clear of the controversy.
"I don't comment on other candidates," Sen. John McCain, the last GOP nominee for president, said with a grin. "I spent a couple of years doing that."
When Sen. John Cornyn, R-Texas, was asked if it was appropriate for Gingrich to call the GOP Medicare plan "right wing engineering," the man whose job is to get Republican senators elected, said he's "staying out of presidential primary politics."
"I don't see any particular advantage to going there," said Cornyn, the chair of the National Republican Senatorial Committee. "I appreciate the question but I'm not going there," he added with a chuckle.