Transcript for Supreme Court Votes to Block Obama's Immigration Reform Plan
tomorrow. Ginger, thank you. We turn to a flashpoint reignited in America tonight over this question. Should they stay or should they go? The supreme court today blocking the president's plan to allow 5 million undocumented immigrants to get legal status and keep them from being deported. Outside the court, runners with the decision, just after it was handed down today. It was summed up in just one sentence from a divided court. Demonstrators on both sides, and this boy, wearing a shirt Reading "Don't deport my mom." Hillary Clinton and Donald Trump immediately jumping into this with very different views tonight. As the president declared today, Americans will decide this in November. ABC's Jonathan Karl is at the supreme court. Yes we can! Reporter: Protests over that stinging defeat for the president. The president had tried to provide legal status for millions with the stroke of a pen. Mostly undocumented immigrants who are the parents of citizens. But the gridlocked supreme court said no. Leaving in place a lower court ruling that said the president had exceeded the power of his office. The president's reaction? Disappointment. We're going to have to decide whether we're a people who accept the cruelty of ripping children from their parents' arms, or whether we actually value families and keep them together for the sake of all of our communities. Reporter: Donald Trump had an entirely different reaction, saying in a state, "Today's 4-4 supreme court ruling has blocked one of the most unconstitutional actions ever undertaken by a president." Immigration has been a central campaign theme since day one. I will build a great, great wall on our southern border, and I will have Mexico pay for that wall. Mark my words. Reporter: The contrast with Hillary Clinton couldn't be starker. Her campaign released this video earlier this year of a girl worried about her parents' undocumented status. I'm scared for them, because of the deportation. I'm scared that they're going to be deported. Come here, babe. I'm going to do everything I can so you don't have to be scared. Reporter: Clinton responded to the ruling in both English and Spanish. Saying, "This decision is a stark reminder of the harm Donald Trump would do to our families, our communities and our country." And Jon Karl with us live tonight. Donald Trump reacting today before flying overseas, and Jon, Hillary Clinton responding within minutes after this decision was handed down? Reporter: David, Hillary Clinton made it clear that if she is elected president, within her first 100 days, she will push congress to enact immigration reform including a path to citizenship for all those undocumented people in the country right now. Donald Trump, of course, his first act would be to build that wall and he's also said he would deport all those undocumented people here in the country. All right, a major issue this November. Jon Karl, thank you. The other major issue in
This transcript has been automatically generated and may not be 100% accurate.