Donald Trump has solidified his national lead over his Republican opponents, according to a new poll.
The Washington Post-ABC News poll, released on Tuesday, found that Trump has the support of 37% of registered Republicans and Republican-leading independents, keeping a consistent lead. Trailing him, Texas Sen. Ted Cruz rose to 21%. In third place, Florida Sen. Marco Rubio has 11%.
Trump’s supporters are more certain about their vote than other candidates’ supporters are, with a majority saying they will definitely for Trump. Republicans also think Trump is better than his rivals on issues, including the economy, immigration and terrorism threats, according to the poll.
The poll, conducted between Jan. 21 and Jan. 24, surveyed 1,001 adults and has a margin of error of +/- 3.5 percentage points overall and +/- 5.5 percentage points among the 356 Republicans and Republican-leaning voters surveyed.
Meanwhile, a new Iowa poll released on Tuesday showed Trump and Cruz neck-and-neck in the Hawkeye State, less than a week away from the caucuses. The Quinnipiac University poll found Trump at 31% and Cruz at 29% among likely Republican caucus-goers. Rubio came in third with 13%.
The Quinnipiac poll, which surveyed 651 likely Republican Iowa caucus-goers, was conducted from Jan. 18 to Jan. 24 and has a margin of error of +/- 3.8 percentage points.
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Write to Katie Reilly at Katie.Reilly@time.com