)Donald Trump’s so-far durable support in the Republican race for the presidential nomination rests largely on widespread dissatisfaction with Washington, and has been bolstered by his vocal criticism of the country’s immigration policies.

A new CNN/ORC Poll finds that just 30% of registered voters nationwide say they feel their views are well represented by the government in Washington, while 40% say they are not represented well at all. That figure spikes among Republican and Republican-leaning voters. Among GOP voters, 53% say they don’t feel their views are well represented in Washington at all, nearly double the 27% of Democrats and Democratic-leaning independents who feel the same way.

And these Republican voters who say their views are not represented at all by the government in Washington are far more likely than other Republicans to back Trump’s run for the White House. Among this group, Trump holds a broad lead: 24% support him vs. 13% behind former Florida governor Jeb Bush, with the rest of the field at 8% or less. These disaffected voters are more likely to say they want Trump to stay in the race (58% vs. 45% among other Republicans) and more likely to think he will ultimately win the party’s nomination: 27% say Trump will, 29% Bush. Among other Republican registered voters, those figures are 34% Bush and 18% Trump.