WASHINGTON – Hillary Clinton headed into the general election campaign in a strong financial position, campaign filings showed Monday.

The former secretary of state's campaign raised more than $28 million in May to head into June with $42.5 million in the bank, it revealed in a filing with the Federal Election Commission.

Most of the funds raised in May, $19.6 million, were allocated to the primary campaign and can be spent through the Democratic convention in late July. About $9 million was raised in May in contributions of $200 or less, the campaign said.

Clinton raised another $782,052 in general election contributions, with another $8.9 million in funds raised through the Hillary Victory Fund, a joint fundraising committee with the Democratic National Committee that benefits state Democratic Party organizations.

Clinton's campaign spent more than $16.7 million in May as she sought to fend off Bernie Sanders in primaries in Indiana, West Virginia, Kentucky and Ohio, as well as investments ahead of California's primary earlier in June.

"We're starting the general election in strong financial shape thanks to the support of more than 1.3 million people and strategic investments that helped us conserve our resources," Clinton campaign manager Robby Mook said in a statement.

Trump's campaign had not filed its monthly spending report, which was due by midnight Monday. His campaign ended April with just $2.4 million cash on hand.

The Republican National Committee raised $13 million in May, and had $20 million on hand at the end of the month, the Associated Press reported. That's just a third of the $60 million it had banked at the same point in 2012.