Support for Sen. Marco RubioMarco Antonio RubioSenate GOP campaign arm outraises Democratic counterpart in September House passes bills to secure telecommunications infrastructure Senators call for answers from US firm over reported use of forced Uyghur labor in China MORE's (R-Fla.) potential presidential bid has slipped and Sen. Rand PaulRandal (Rand) Howard PaulRand Paul calls for Fauci's firing over 'lack of judgment' Vaccine 'resisters' are a real problem Democrats fret as longshot candidates pull money, attention MORE (R-Ky.) leads in the key early-voting state of Iowa, according to a new GOP primary poll conducted by the Democratic firm Public Policy Polling.
Rubio's support has slipped to 11 percent, down from the 16 percent support he had when PPP last polled the state in February. The result come as Rubio fends off conservative criticism for his strong support of a bipartisan immigration bill in the Senate.
Paul, meanwhile, has risen from 10 percent support in February to 18 percent today.
The Florida senator's dip could be driven more by others' rise than his own stature, however.
Rubio's favorable rating stayed unchanged at 54 percent, with a statistically insignificant change from 13 to 14 percent in those who view him unfavorably.
The possible candidates are all very close to one another, however, well within the poll's 6.2 percent margin of error.
Paul is just 2 percentage points ahead of New Jersey Gov. Chris Christie (R), who has 16 percent support.
Former Florida Gov. Jeb Bush (R) pulls 14 percent, Sen. Ted CruzRafael (Ted) Edward CruzOvernight Health Care — Presented by Carequest — Colin Powell's death highlights risks for immunocompromised The Senate confirmation process is broken — Senate Democrats can fix it Australian politician on Cruz, vaccines: 'We don't need your lectures, thanks mate' MORE (R-Texas) is nipping at Rubio's heels at 10 percent support and former Sen. Rick Santorum (R-Pa.), who won Iowa's 2012 presidential caucuses, sits at 6 percent.
This isn't the only recent PPP poll showing Rubio trailing the field of potential candidates, after some polls earlier this year showed him as the front-runner.
PPP's recent poll of Texas Republicans found Rubio in sixth place among candidates, with 6 percent support, and a recent poll of Montana Republicans found him in fifth place.
On the Democratic side, Hillary ClintonHillary Diane Rodham ClintonSuper PACs release ad campaign hitting Vance over past comments on Trump I voted for Trump in 2020 — he proved to be the ultimate RINO in 2021 Neera Tanden tapped as White House staff secretary MORE dominates her potential primary opponents, with 71 percent support to 12 percent for Vice President Biden and 5 percent for Sen. Elizabeth WarrenElizabeth WarrenDems look to keep tax on billionaires in spending bill Six big off-year elections you might be missing Republican spin on Biden is off the mark MORE (D-Mass.). In the general election, Clinton leads all comers by 7 percentage points or more.
PPP's automated poll of 668 voters, including 250 GOP primary voters and 260 Democratic primary voters, was conducted from July 5-7.
The margin of error for the total poll was 3.8 percent, with margins of error of 6.1 percent and 6.2 percent for the Democratic and Republican primary samples.