Marco Rubio got a key endorsement from the founder and chief executive of Hobby Lobby, which was at the center of a successful case against Obamacare's birth control mandate.

The Sunday endorsement is a blow to Ted Cruz's push to consolidate the evangelical vote ahead of Super Tuesday on March 1, when 11 states will vote.

David Green, the arts and crafts store's founder and CEO, said in a statement that Rubio impressed him with "his preparation and the way he carries himself. But most importantly, Marco regularly exhibits humility and gives the glory to God."

Green also took a swipe at GOP frontrunner Donald Trump. Green said that the family business that began with just $600 "has quite possibly been more successful than Mr. Trump's, but that doesn't make either of us qualified to be president. And unlike Mr. Trump, we give all the credit to God."

Hobby Lobby was behind a successful lawsuit against the administration's birth control mandate, which requires insurance plans to cover birth control as a preventive measure.The Obama administration had allowed only nonprofit religious organizations to opt out of the requirement. The Supreme Court ruled that the opt-out, called an accommodation, must also apply to private, closely held businesses such as Hobby Lobby.

The court is expected to rule on the mandate again. This time the lawsuit is coming from religious nonprofits such as charities and universities that disagree with the accommodation.

The accommodation has an insurer pay for birth control coverage instead of the employer, but the organizations want an exemption which means their employees get no birth control coverage at all.