The seven candidates vying to be the next California governor squared off Wednesday night in their second debate in two days, with the state's housing shortage and a proposed millionaire tax emerging as the most hotly debated issues.

The debate was the final televised one before the June 2 primary. The top-two vote-getters, regardless of political party, will advance to the general election.

The Republican candidates were Steve Hilton, a former Fox News host, and Chad Bianco, the Riverside County sheriff. 

The Democratic candidates were Katie Porter, a former congresswoman; Tom Steyer, a former hedge fund manager; Xavier Becerra, a former California attorney general; Antonio Villaraigosa, a former mayor of Los Angeles; and Matt Mahan, the mayor of San Jose.

On the issue of a billionaire tax initiative that's likely to qualify for the ballot in November, the only candidate to support the measure was Steyer, who is a billionaire. 

The Republican candidates argued it would drive away companies from the state, which would hurt innovation, and Democrats said a one-time tax makes little sense. It would only apply to a few people and wouldn't support education. 

Some of the Democratic candidates said they'd support another approach to taxing billionaires. 

Bianco pointed out that immigrants commit many violent crimes, which Porter tried to counter. Bianco told Porter, who is a mother, that she should argue her points with the mothers of the victims of the crimes, according to The New York Times. 

Porter said she didn't need any lectures about being a mother from him, to which Bianco replied, "You might." 

Discussions on housing and homelessness reportedly dominated the debate, which was held in Los Angeles, among the California cities struggling the hardest with the problems, especially after losing so many homes in wildfires last year. 

Hilton said he wanted to build more subdivisions linked by freeways and to cut regulations to make construction more affordable. Steyer said he supported denser zoning near public transit sites, The New York Times also reports.

The Times also reports no candidates dominated the debate, but none of their performances fell flat, either.