Donald Trump’s $51 million June fundraising haul has Robby Mook spooked.

Hillary Clinton’s campaign manager sent an email to supporters on Thursday claiming, “It doesn’t represent us — but it could beat us in November.”

He writes:

News broke yesterday that Donald Trump’s campaign and the RNC raised $51 million in June — that’s up from just $3 million in May.

I want you to think about what that money represents. It means $51 million to a guy ready to build a wall on the Mexican border. To a candidate ready to discriminate against Muslim people because of their religion, who wants to ban abortion and then punish women who get them.

That $51 million doesn’t represent us. It doesn’t represent our values or who we are as Americans.

It doesn’t represent us — but it could beat us in November.

He then asked readers for $1 to combat Trump’s $51 million.

As for Trump’s June fundraising, the Washington Post reported the haul “beat expectations.”

According to the paper:

Donald Trump raised more than $26 million through online and mail solicitations in June and another $25 million at events with the Republican National Committee, his campaign announced Wednesday, a hefty haul that his allies hope will put to rest anxieties in the party about his fundraising prowess.

The combined $51 million falls short of the $68.5 million that Democratic contender Hillary Clinton and the Democratic Party collected in June, which included $40.5 million she raised directly for her campaign. But it was the biggest monthly take by far for the presumptive GOP presidential nominee, who did not begin to hold fundraising events until late May. And it suggests Trump has the ability to quickly inject large sums of money into his campaign coffers by tapping into the fervor of his supporters.

Much of the campaign’s money appears to have come in during the final 10 days of the month, when Trump’s operation began aggressively soliciting money online for the first time. The Trump campaign announced Wednesday that more than 400,000 supporters made donations in June, with more than $3 million coming in just one day. That indicates that the billionaire will be able to post far larger totals in the coming months if he continues to actively urge his backers to give.