Cruz started 2016 with $18.7 million on hand.
Priorities USA Action raised $41 million on behalf of Clinton in 2015.
It was reported in November that Paul Singer would be supporting Rubio.
The Freedom Partners Action Fund had $14.8 million cash on hand.
The 2016 Committee spent almost all of the $10 million it raised.
Priorities USA raised $25 million in the second half of 2015 and another $10 million in January.
The Republican National Committee says it's a non-election year record for the party.
Rep. David Jolly plans to forgo personally soliciting donations for his own Senate campaign.
Trump says his campaign is $350,000 under budget.
The FEC opinion came after two key PACs with ties to congressional Democrats made their pitch.