John Locher, Associated Press
Hillary Rodham Clinton speaks with a group, including students, about immigration at an event at Rancho High School in Las Vegas. President Barack Obama says his executive actions shielding millions living in the U.S. illegally from deportation extend as far as the law allows. But Clinton says that if she becomes president, she would go even further.

WASHINGTON — President Barack Obama says his executive actions shielding millions living in the U.S. illegally from deportation extend as far as the law allows. But Hillary Rodham Clinton says that if she becomes president, she would go even further.

Clinton's aggressive stance reinvigorates the debate over the scope of presidential powers, which has become a flashpoint in Washington's politically fraught immigration fight. It also raises questions about the legality of Clinton's proposals and sets up a potential conflict between the Democratic front-runner and the White House.

The president unveiled executive measures last fall that spare up to 5 million people from deportation. The administration also set new enforcement priorities that could make it easier for many more people in the U.S. illegally to stay in the country.