Ted Cruz Plans to Filibuster Any Supreme Court Nominee Made by President Obama

The Republican candidate for president appeared on "This Week."

Cruz described the Supreme Court vacancy left by Scalia as having a "profound impact" on the Republican primary that will change the contours of the presidential race. He argued voters -- not a "lame-duck president" -- should decide who will replace the longtime conservative judge who died Saturday.

"This is a 5-4 court -- the next election needs to be a referendum on the court," Cruz told ABC News' George Stephanopoulos. "People need to decide."

President Obama said Saturday he planned to nominate a replacement for the vacancy on the Supreme Court. Cruz said he would "absolutely" filibuster before the Senate could vote on the nominee.

"If Donald Trump becomes president, the Second Amendment will be written out of the Constitution because it is abundantly clear that Donald Trump is not a conservative. He will not invest the capital to confirm a conservative, so the result will be the same whether it’s Hillary [Clinton], Bernie [Sanders] or Donald Trump," Cruz said. "The Second Amendment will go away."

Cruz, who clerked for former Chief Justice William Rehnquist and argued many cases in front of the Supreme Court as solicitor general of Texas, attempted to contrast his judgment with Trump's.

Trump has said he would not nominate his sister because it would be a conflict of interest, and said he was joking when he mentioned her as a potential nominee.

Cruz also hit at Trump following Saturday's debate in South Carolina, saying it showed the real estate mogul isn't a conservative.

The two sparred during the debate with Trump calling Cruz a liar and Cruz saying Trump relies on insults to stop discussions about his record.