(CNN)Donald Trump and Hillary Clinton are poised to lead the nation's two major parties in this fall's presidential election, with a new nationwide CNN/ORC poll finding each well ahead of their closest competitors just as the race expands to a national stage.
Trump has expanded his lead over the diminished field to capture the support of nearly half of Republican voters, while Clinton tops Sanders by nearly 20 points.
On the Republican side, the new survey finds Trump's lead is dominant, and his support tops that of his four remaining opponents combined. The businessman tops his nearest competitor by more than 30 points: 49% back Trump, 16% Marco Rubio, 15% Ted Cruz, 10% Ben Carson and 6% John Kasich.
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