Now back here at home, a surprising twist in the presidential race. Governor romney facing criticism tonight not from the president or the democrats, but from some prominent members of his own party... See More
Now back here at home, a surprising twist in the presidential race. Governor romney facing criticism tonight not from the president or the democrats, but from some prominent members of his own party and our new abc n news/"washington post" poll shows it. Take a look. A 6% lead. Before the conventions romney had a slight lead. The election now 56 days away, "your voice, your vote," and abc's david muir reports from las vegas tonight. Reporter: Mitt romney in nevada, on the anniversary of 9/11 in front of the national guard. We must keep our promises and regain the trust of all who have worn the uniform and served our country. Reporter: His words come after criticism romney left afghanistan out of his convention speech. But tonight, his loudest critics might be within his own party, after those poll numbers showing the president now leading the race. More americans now trust the president on the economy than romney. And on that point conservative commentator laura ingraham jumping in tweet ing "earth to team romney. Time to apply turnaround skills to romney's campaign." On her radio show -- if you can't beat barack obama with this record, then shut down the party. Shut it down. Start new with new people. Reporter: And there's conservative george will arguing unemployment about 8%, worse if you count those who have given up. If the republican party cannot win in this environment, it has to get out of politics and find another business. Reporter: And late today, even romney surrogate donald trump tweeting what he heard from rush limbaugh today -- "if obama wins, it is the end of the republican party." Many conservative critics now argue romney must start For example, on romney's promise of tax cuts for all without raising the deficit, many economists asking, when will romney list which tax deductions he will get rid of to make up the difference. So many deductions commonplace in america like the mortgage interest deduction. And what about romney's promised cuts to rein in the deficit? There was this exchange between diane and mitt romney's running mate paul ryan. He said a 5% cut in basic discretionary spending. On what? That's budgets. Reporter: Get more specific about the cuts. Mitt romney's been more specific on what it takes to prevent a debt crisis on solutions to get people back to work than anybody else running for president including the president himself. Reporter: As one conservative writer put it romney can no longer tell the american voters he's handled the economy better. That writer saying romney has to show it, not tell it.
This transcript has been automatically generated and may not be 100% accurate.