The GOP's Senate health care bill collapsed on Monday evening after two more senators announced they would not back the bill.
Second on the list was unemployment, with 13 percent of respondents saying it was the most important issue.
The delayed vote on the bill has yet to persuade senators of its merits.
Democrats are salivating over the Russian hacking scandal, but it may not help them retake power in Washington.
Medical travel is becoming more popular as millions of Americans fear losing their health care coverage or face long waiting times.
Top aides to Charles Koch, the billionaire energy magnate, said the Senate bill does not go far enough to dismantle former President Barack Obama's signature healthcare law, also known as Obamacare.
The president said Obama had used the same words he used to describe the healthcare bill.
President Donald Trump can only afford to lose two GOP votes.
The Republican senators working on the Obamacare repeal-and-replace bill have received hundreds of thousands in campaign contributions from the two big lobbies.