At least seven other Rubio mega donors say their candidate has already received monetary commitments in excess of the $40 million he will likely need to battle through a presidential primary season that will feature a crowd of seasoned Republican candidates with strong financial backing.

Rubio’s whirlwind money-raising comes after a network of Senator Ted Cruz super PACs raked in $31 million following Cruz’s announcement in March that he was seeking the Republican presidential nomination.

The breakneck pace of the 2016 fundraising, most notably characterized by former Florida Governor Jeb Bush’s reputed aim to raise $100 million, is emblematic of how much the Supreme Court’s 2010 Citizens United decision unleashed an era of unfettered political spending by for-profit corporations and the rich, altering the financial calculus of campaigns.