Democratic fundraisers are urging Hillary Clinton to make Bill Clinton a bigger part of her presidential campaign, particularly when it comes to fundraising.

The donors, who have contributed some of the biggest checks to President Obama and the Democratic Party, are disappointed by the lack of face time, overall communication and gratitude from Hillary Clinton on the campaign trail.

“Fundraising is not a natural strong suit for Hillary,” one top Democratic fundraiser bluntly said.

Hillary Clinton is “lacking a certain personal touch,” the person said. The source added that the former secretary of State “publicly, is a little stiff.”

Donors think Bill Clinton, who so far has been on the sidelines of his wife’s presidential bid, could fill a void for the campaign.