Two hours until votes are counted in Pennsylvania, SurveyUSA has the results of a just-conducted nationwide poll that says 55% of Americans say Clinton should remain in the race, even if she should lose in Pennsylvania.

• Among Democrats, 59% say Clinton should remain in the race if she loses the Keystone State; 39% say she should drop out.
• Among Republicans, 49% say Clinton should remain in the race if she loses tonight; 48% say she should drop out.
• Among Independents, 54% say Clinton should remain in the race if she fails to win PA; 40% say she should drop out.

Other findings:

• 65% of Americans — including 78% of Republicans and 58% of Democrats — say Clinton and Obama should continue to run separate campaigns; 28% overall say they should join forces and create one ticket.
• If Clinton and Obama were to create a single ticket, 48% would prefer to see Clinton as the presidential candidate and Obama as the vice presidential; 40% would prefer the opposite setup, with Obama at the top of the ticket.

Who has run the better campaign for President?

• 34% say Barack Obama.
• 25% say Hillary Clinton.
• 38% say the two campaigns have been about equal.

Full results of the poll are here.