Democratic presidential candidate Hillary Clinton turned down an invitation to participate in a Fox News debate, an event that her rival Vermont Sen. Bernie Sanders agreed to attend. Instead, the campaign said it believes its time will be “best spent” preparing for the coming general election.

“We have declined Fox News’ invitation to participate in a debate in California,” said Clinton campaign spokesman Jennifer Palmieri in a statement. “As we have said previously, we plan to compete hard in the remaining primary states, particularly California, while turning our attention to the threat a Donald Trump presidency poses. We believe that Hillary Clinton’s time is best spent campaigning and meeting directly with voters across California and preparing for a general election campaign that will ensure the White House remains in Democratic hands.”