The seven California Democrats who flipped GOP-held congressional seats in November may be at the top of the Republicans’ 2020 target list, but the latest campaign finance numbers suggest it’s not going to be easy — or cheap — to take them out.

Four of those first-term Democrats each raised more than $700,000 in the quarter that ended June 30, according to figures released by the Federal Election Commission. They were led by Rep. Katie Porter of Irvine, who took in more than $1 million.