With polls indicating a dead heat in Florida's U.S. Senate contest, Hillary Clinton's presidential campaign is reaching into its war chest to help the Democratic candidate, Patrick Murphy, unseat Sen. Marco Rubio.

Clinton campaign manager Robby Mook told reporters this week the campaign is diverting $6 million to aid down-ballot Democratic candidates in seven swing states, including Florida. It's unclear how much of the money will benefit Murphy and other Florida congressional candidates through the party's coordinated campaign apparatus.

"It's clear that (Clinton) needs a Democratic Senate to work with, and it's not just Florida, Pennsylvania, there's quite a few other states that she's investing resources into to ensure that when she gets to office, she's going to hit the ground running," Murphy said after a Tuesday roundtable discussion with Hispanic leaders in Tampa.  

The cash infusion comes at a critical time for Murphy.

Despite pulling even with Rubio in polls conducted amid the sexual assault controversy engulfing Donald Trump, Murphy has seen pledges of support from the Democratic Senatorial Campaign Committee evaporate.

The DSCC has canceled millions of dollars worth of planned advertising in the Senate race, most recently nixing a statewide ad buy slated for the week before the Nov. 8 election.

Democratic strategists say the DSCC's desertion of Murphy can be traced to the rising prospects of Democrats in Senate contests in Indiana, Missouri, North Carolina, home to smaller media markets and, as a result, less expensive advertising rates.

Florida, on the other hand, boasts some of the most expensive media markets. A week's worth of statewide advertising can cost in upwards of $1.5 million, which is why the Clinton campaign's financial assistance likely won't enable the Murphy campaign to salvage the ad blitz.

"In a presidential cycle like we're in right now, it doesn't matter if that entire $6 million was dumped into Florida," Democratic strategist Kevin Cate said. "It wouldn't make or break Patrick Murphy's campaign right now, because there's so much that has to go in to getting attention in Florida."

If the money helps boost turnout for the entire Florida Democratic ticket, however, Murphy could emerge the prime beneficiary. Democratic operatives are encouraged at the prospect, pointing to data showing Democrats initially outpacing Republicans in returned mail-in ballots, a first for a Florida presidential election cycle.