Donald Trump may be unpopular with a majority of California Republicans, but the real estate mogul is poised to dominate the California primary over rivals Ted Cruz and John Kasich as he tries to secure the Republican presidential nomination, according to an ABC7-Southern California News Group poll released Monday.

The survey also showed Hillary Clinton with a double-digit lead over Bernie Sanders for the Democratic presidential nomination, and it revealed there is very little chance for Republicans to capture the seat being vacated by Sen. Barbara Boxer as two Democrats appear set to move forward to the general election after the June 7 primary.

Despite the survey’s findings that reveal Trump is viewed negatively by 51 percent of California Republicans, he is the preferred candidate by 54 percent of likely GOP voters. Cruz is favored by 20 percent of likely voters and Kasich trails with 16 percent.

The real drama for the California primary will be if Trump can secure the party nomination by collecting enough of the state’s 172 delegates to reach the 1,237 needed to avoid a contested convention in Cleveland this summer. Currently, Trump leads Cruz 996 to 565 in delegates.

The results may also place extra pressure on Cruz to perform well in Tuesday’s Indiana primary, where recent polls show his support flagging in the face of Trump’s momentum. The GOP frontrunner has continued to generate momentum after winning a slate of primaries two weeks ago in the Northeast, his appearances at a large rally in Costa Mesa and the Republican state party convention outside of San Francisco. Each development bolstered his claims to be the “presumptive nominee.”

Sanders appears to have lost traction since Clinton took four out of five primaries two weeks ago and his campaign laid off hundreds of campaign workers in the wake of those defeats. The Vermont senator recently opened two official offices in Los Angeles and Oakland, but his 19-point deficit to Clinton in California is the largest he’s faced since polling has been done in California this year.

Just last month, Sanders had narrowed Clinton’s lead to 6 points in a California Field Poll. He also trails Clinton in pledged delegates 1,645 to 1,318. With Clinton’s unbound superdelegates, she stands at 2,165 delegates – just 217 shy of the total needed to win the Democratic presidential nomination. California has 475 delegates to dole out June 7.

The state’s top-two primary system also appears to keep California blue in the U.S. Senate, with three Republicans splitting their vote enough to allow U.S. Rep. Loretta Sanchez and California Attorney General Kamala Harris to fight it out in November.

Harris holds the largest lead in the wide field of candidates with 32 percent of the vote while Sanchez sits at 18 percent. Republicans Tom Del Beccaro, Ron Unz and Duf Sundheim combined got 25 percent of the vote – with Beccero the GOP leader at 10 percent.

Commissioned by SurveyUSA for SCNG/ABC7, the poll was conducted between April 27-30 and, of 2,011 registered voters, 529 were determined to be likely voters in the Republican primary and 826 Democrats and unaffiliated voters were likely to vote in the Democratic primary.