In the email, Rubio writes that a victory for Gomez would be a "huge step" toward replacing Senate Majority Leader Harry ReidHarry Mason ReidTrump presses GOP to change Senate rules Only thing Defense’s UFO probe proves is power of political favors Nevada Democrat accused of sexual harassment reconsiders retirement: report MORE (D-Nev.) with a Republican majority leader.

"Gomez is a business leader and a former Navy Seal who knows what it means to fight for our freedoms. Now he's fought within inches of a major political upset that could have national implications — which is why liberals have pulled out all the stops," Rubio writes in the fundraising email from Reclaim America PAC. "Gomez is currently facing a massive onslaught of Democratic special interest money. Everyone from President Obama to Harry Reid to a host of Hollywood liberals have pitched in to help defeat Gomez. Now it's time to come to his aid."

The email comes just three weeks ahead of the special election for Secretary of State John KerryJohn Forbes KerryKentucky candidate takes heat for tweeting he'd like to use congressman for target practice Breitbart editor: Biden's son inked deal with Chinese government days after vice president’s trip State lawmakers pushing for carbon taxes aimed at the poor MORE's former Senate seat.

Republicans in Massachusetts are reportedly spending $400,000 on ad spending in support of Gomez.

High profile political figures have also campaigned on behalf of Markey and Gomez, respectively. Sen. John McCainJohn Sidney McCainTrump congratulated Putin after his national security team told him not to: report Trump faces backlash after congratulating Putin on election win McCain rips Trump's congratulatory call to Putin as an insult to Russian people MORE (R-Ariz.) campaigned for Gomez and first lady Michelle ObamaMichelle LeVaughn Robinson ObamaSmithsonian moves Michelle Obama portrait to larger space over high demand Trump celebrates St. Patrick's day on Twitter Michelle Obama’s advice to girls: 'Do not be afraid to fail' MORE attended a recent fundraiser for Markey.