Former Rep. Rob Portman (R-Ohio) and Sen. Barbara Boxer (D-Calif.) will report large first quarter hauls.

Portman raised $2.35 million in the last three months, mainly from in-state donors, his campaign confirmed to the Ballot Box Monday. The first quarter total brings his cash on hand to $7.6 million.

Democrats Jennifer Brunner and Lee Fisher have yet to release their numbers. Both have trailed Portman in fundraising and will surely have a higher burn rate than the Republican ahead of their May 4 primary.

In California, Boxer has raised $2.4 million since January – her "strongest fundraising quarter yet," according to a release. Boxer now has $8.7 million cash on hand, after banking $1.5 million of her first quarter haul.

Former Rep. Tom Campbell (Calif.) is the only Republican vying to face Boxer who has released his numbers. He raised $1.63 million for his Senate campaign last quarter.