A new Quinnipiac University poll shows three Republican incumbent senators leading their would-be Democratic opponents.

The poll released Thursday shows Ohio Sen. Rob Portman leading former Gov. Ted Strickland by 7 percentage points, a jump from the previous poll which had seen the two in a statistical tie.

Portman appears to have a significant fundraising advantage over Strickland, with $13 million in cash on hand. Strickland has lagged in fundraising in the past but has yet to release his second quarter numbers.

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In Pennsylvania, GOP Sen. Patrick J. Toomey is beating Katie McGinty , former chief of staff to Gov. Tom Wolf, by 10 points.