Poll: Trump holds double-digit lead in Oregon
© Getty Images

Republican presidential front-runner Donald TrumpDonald John TrumpConservatives express concern over House GOP immigration bill Poll: McSally holds 14-point lead in Arizona GOP Senate primary Trump defends Nielsen amid criticism over family separations MORE holds a double-digit lead over his competitors in Oregon, according to a new poll by Portland-based Hoffman Research Group.

Trump has 43 percent support in the poll, followed by Ted CruzRafael (Ted) Edward CruzConservatives express concern over House GOP immigration bill GOP senators introduce bill to prevent family separations at border Senate GOP tries to defuse Trump border crisis MORE with 26 percent and John Kasich with just 17 percent support.

Cruz and Kasich announced last weekend a joint effort to deny Trump the nomination. As part of the strategy, Kasich would clear a path for Cruz in the Indiana primary and Cruz would back down in Oregon and New Mexico. But both candidates have walked away from the arrangement since their campaigns' announcement.

Kasich still falls 9 points behind the Texas senator in Oregon, according to the poll.

The survey also found that 49 percent of Republican voters view Trump favorably and 40 percent have an unfavorable view of the front-runner. Cruz has a favorability rating of 42 percent and is viewed negatively by 37 percent of Republican voters.

Kasich is viewed positively by 34 percent and negatively by 25 percent of Republican respondents. According to the poll, 17 percent of respondents said they had never heard of Kasich.

The survey also found that 53 percent of men are supporting Trump, but just 34 percent of women. Trump also has more support among older voters and less-frequent voters. 

The poll was conducted this week among 555 Republican voters and has a margin of error of 4.2 percentage points.

The Oregon Republican primary will be May 17.