Florida Republican Senator Marco Rubio will not endorse David Rivera in the Republican primary.
The Florida senator and Rivera, who is running for the 26th Congressional district, have been allies before.
If Rivera wins the primary, he'll face off against Democrat Joe Garcia.
Rubio reportedly has said that he would support Rivera if he won the primary.
Rivera has been under investigation in the past for finance irregularities during his time in the legislature.
(Photo: John Gress / 2014 Getty Images)