Ted Cruz set himself apart from much of the GOP field on Wednesday by voicing support for altering the 14th Amendment to end the policy. "Absolutely," Cruz said when asked during an interview if he would be in favor of a constitutional change to achieve that aim.
So far Cruz appears to be alone in backing a constitutional amendment to end birthright citizenship on the campaign trail. But he's not the only Republican eyeing the White House to have called for a constitutional change to overturn the policy.
In 2011, Rand Paul sponsored a congressional resolution to amend the Constitution and end automatic birthright citizenship for children if both parents were illegal immigrants. A year earlier, Lindsey Graham called birthright citizenship "a mistake," saying, "We should change our Constitution and say that if you come here illegally and you have a child, that child's automatically not a citizen."
Scott Walker, Bobby Jindal, Ben Carson, and Rick Santorum have either criticized birthright citizenship or called for an end to the policy, but they have not explicitly called for changing the Constitution in the aftermath of Trump's vehement opposition.
Letting states define marriage
Striking directly at the Supreme Court's verdict that same-sex marriage is legal, Scott Walker and Ted Cruz have both voiced support for a constitutional amendment that would let states decide the definition of marriage.
"As a result of this decision, the only alternative left for the American people is to support an amendment to the U.S. Constitution to reaffirm the ability of the states to continue to define marriage," Walker said after the court verdict.
Cruz, meanwhile, has introduced the "Restoration of Marriage Amendment" in April. The measure, per the Texas senator's website would amend "the Constitution to guarantee the right of the people to define marriage in their laws as the union of one man and one woman."
While Cruz and Walker would let states define marriage, Rick Santorum has staked out a position to the right of both 2016 contenders by calling for a constitutional amendment that would create "a national standard for marriage" by defining marriage as strictly a union between a man and a woman.
Overturning Citizens United
Democrats looking toward 2016 rarely miss an opportunity to attack the flood of money in politics—and the leading presidential contenders on the Left think that a constitutional amendment may be the thing to fix what they say is a serious problem.
Hillary Clinton and Bernie Sanders both support a constitutional amendment to overturn the Citizens United Supreme Court verdict that paved the way for corporations to spend unlimited amounts of money in an attempt to influence the outcome of elections.
Earlier this year, Sanders introduced a constitutional amendment to roll back the high Court ruling, calling Citizens United "one of the most disastrous decisions" in the history of the Supreme Court.