"Mitch McConnellMitch McConnellMcConnell: ‘Ticket-splitting’ will preserve GOP Senate majority The Trail 2016: Biting the hand that feeds him McConnell: Trump should release his tax returns MORE's quiet, principled leadership is key to everything we accomplish on Capitol Hill," Rubio said during the event, according to CNN.
"The way he fought ObamaCare, tooth and nail, and forced the Democrats to use extraordinary measures to pass it was a critical catalyst in electing my entire class of Senate conservatives in 2010. Without Mitch, I don't know that we'd have Senator Rubio, Senator Johnson, Senator Paul or Senator Lee."
Sens. Ron JohnsonRon JohnsonMcConnell: ‘Ticket-splitting’ will preserve GOP Senate majority Senate report: Systematic failures at VA watchdog led to veterans' deaths Clinton emails dominate Sunday shows MORE (R-Okla.), Rand PaulRand PaulMillion-dollar super-PAC donation coming for Libertarian ticket Adelson aides in talks to make pro-Trump super PAC GOP senators move to keep women out of military draft MORE (R-Ky.) and Mike LeeMike LeeGOP senators move to keep women out of military draft Meet the billionaire donor behind Hulk Hogan’s lawsuit against Gawker Overnight Cybersecurity: Guccifer plea deal raises questions in Clinton probe MORE (R-Utah) all have Tea Party support, and affiliating himself with all three will likely help McConnell appeal to those skeptical voters on the right.
McConnell is likely to face a strong challenge from Democrats as well, who believe he is one of the nation's most vulnerable incumbents in 2014. Two Democratic contenders, actress Ashley Judd and Kentucky Secretary of State Alison Lundergan Grimes, have emerged as possible challengers.