Senate poll raises Republican hopes in Pennsylvania, Florida
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Republicans have narrow leads in two Senate races they must win to hold the majority, according to a new poll released Tuesday.

In Florida, Quinnipiac University’s survey finds Sen. Marco RubioMarco Antonio RubioOvernight Defense: US to send 1K more troops to Mideast amid Iran tensions | Iran threatens to break limit on uranium production in 10 days | US accuses Iran of 'nuclear blackmail' | Details on key defense bill amendments Overnight Defense: US to send 1K more troops to Mideast amid Iran tensions | Iran threatens to break limit on uranium production in 10 days | US accuses Iran of 'nuclear blackmail' | Details on key defense bill amendments Senators revive effort to create McCain human rights commission MORE (R) ahead of Rep. Patrick Murphy (D) by a slim, 2-point margin, at 49 percent to 47 percent. And in Pennsylvania, Sen. Patrick ToomeyPatrick (Pat) Joseph ToomeyOvernight Defense: Pick for South Korean envoy splits with Trump on nuclear threat | McCain blasts move to suspend Korean military exercises | White House defends Trump salute of North Korean general WH backpedals on Trump's 'due process' remark on guns Top GOP candidate drops out of Ohio Senate race MORE (R) leads Democrat Katie McGinty by a 49 percent to 45 percent margin, the poll found.

Democrats need a net gain of at least 5 seats to win 51-seat majority in the Senate and have placed high hopes on Pennsylvania, a state where their presidential nominee, Hillary ClintonHillary Diane Rodham ClintonBroadway play 'Hillary and Clinton' closing early due to low ticket sales Broadway play 'Hillary and Clinton' closing early due to low ticket sales Facing challenge from Warren, Sanders touts strength against Trump MORE, has consistently led Donald TrumpDonald John TrumpTrump says 'Failing New York Times' should be held 'fully accountable' over Russia report Trump says 'Failing New York Times' should be held 'fully accountable' over Russia report Trump tweets ICE will begin removing 'millions' of undocumented migrants MORE in polls.

While Republicans are worried about Toomey, they are more confident about Florida. The Miami Herald reported on Tuesday that the Democratic Senatorial Campaign Committee is pulling resources from the state, which could be a sign that they no longer think Murphy can win. 

The Quinnipiac survey also found that Sens. Michael BennetMichael Farrand BennetDemocratic presidential hopefuls react to debate placement Democratic presidential hopefuls react to debate placement The Hill's 12:30 Report — Presented by MAPRx — Biden, Sanders to share stage at first DNC debate MORE (D-Colo.) and Rob PortmanRobert (Rob) Jones PortmanHouse passes bill to establish DHS cyber 'first responder' teams House passes bill to establish DHS cyber 'first responder' teams Democrats needle GOP on standing up to Trump MORE (R-Ohio) could be headed for a cakewalk on Election Day.

Bennet leads local Republican county commissioner Darryl Glenn by a margin of 56 percent to 38 percent; Portman leads former Gov. Ted Strickland (D) by a margin of 54 percent to 41 percent. 

Quinnipiac surveyed more than 600 likely voters in each state on land lines and cellphones with margins of error at about 4 percent. The polling took place from Oct. 10 to 16.