Washington (CNN) - The Adelson family continues to be the major benefactor behind the super PAC supporting Newt Gingrich's candidacy, Winning Our Future.
While Nevada casino mogul Sheldon Adelson - who has donated $7.5 million to the group - did not give more in March, his wife Dr. Miriam Adelson contributed an additional $5 million last month, according to a report filed late Friday night with the Federal Election Commission. All totaled she has given $12.5 million and the family has given more than $20 million.
The family's contributions to Winning Our Future are a major reason the group has been able to continue operating. In total the group has raised $23 million.
It brought in $5,051,082 last month, meaning almost all of its receipts were from Miriam Adelson's one contribution, which came on March 21.
The PAC has $5.8 million cash on hand. It spent just over $1.5 million last month supporting Gingrich's candidacy at a time when his run for president faced major financial problems and questions about its viability.
Adelson is also beginning to support other causes. He contributed $5 million in February to the Congressional Leadership Fund, which is tasked with keeping Republicans in control of the House of Representatives.
Adelson has indicated to Mitt Romney and his supporters he will back the former Massachusetts governor if he wins the nomination, sources familiar with the matter have told CNN. Last month while they were in Las Vegas for a Republican Jewish conference, a group of donors to the pro-Romney super PAC Restore Our Future met with Adelson asking for his support.
And in comments captured by JewishJournal.Com last month, Adelson said Gingrich was "at the end of his line." He made the comments at The Venetian, the hotel and casino he owns in Las Vegas.
Regarding Romney, Adelson said, "He's not the bold decision-maker like Newt Gingrich is. He doesn't want to – every time I talk to him, he says, 'Well, let me think about it.'"
Adelson compared Romney to President Barack Obama as two men who don't always make firm commitments on issues.
Adelson said he has talked to Romney many times, and the two met during the lead-up to the Nevada caucuses in February.