The so-called 'convention bounce' that Hillary Clinton received in the polls after her party's four-day nominating event isn't dissipating.

Clinton has her largest lead over Donald Trump since May in this week's NBC/Survey Monkey tracking poll.

She's now above the watermark at 51 percent to Trump's 41 percent. A week ago, the same survey had the race two points closer. Clinton gained one as Trump lost a percent in the days that followed.

A Quinnipiac University poll of three swing states has Clinton up by 10 in Pennsylvania, as well, 52-42.

Her three-day bus tour that included stops in that state and Ohio also helped to hoist the Democratic candidate up over Trump in the Buckeye State. She's now four points ahead of him there.

In Florida the candidates are neck and neck. Clinton leads by one.

Former Secretary of State Hillary Clinton's post-convention bounce doesn't seem to be dissipating

Clinton has her largest lead over Donald Trump since May in this week's NBC/Survey Monkey tracking poll.

Prior to the Democratic National Convention, three polls had Clinton and Trump tied in Ohio.

The Quinnipiac survey conducted last week and released today has her breaking away from the billionaire. She had 49 percent backing in the poll and he had 45 percent.

NBC News released three statewide polls Tuesday afternoon and the Buckeye State survey mirrored the results of Quinnipiac University poll.

Clinton is up by five points in Ohio, 43-to-38 percent. Last month they were tied.

In Pennsylvania she was now up by 11 points, in a survey where she was previously up nine.

And in Iowa, where she's traveling tomorrow to campaign, Clinton is up 41 percent to 37 percent – four points – a very slight gain from the three points she was up over Trump last month.

In Florida, she has been unable to gain a solid foothold despite numerous visits to the state and commercials on the air.

A Suffolk University survey taken at the beginning of week had her beating Trump 48-42. Quinnipiac says the race is 46-45.

When Libertarian Gary Johnson is included as an option along with Green Party candidate Jill Stein, the race is much closer nationally but Clinton maintains her edge in Pennsylvania.

She would still beat Trump by nine percent in the state even if the minor party candidates are included on the ballot. Her lead would shrink to two in Ohio, however, and Trump would tie her 43-43 in Florida.

In NBC's survey Clinton had 44 percent backing and Trump was at 37 percent when Johnson was included - he polled at 10 percent - as was Stein - she had four percent.

The survey was taken from August 1 to August 7. The Democratic convention in Philadelphia concluded on Thursday, July 28.

Prior to the parties' respective gatherings, Clinton and Trump were separated by a single point in the weekly survey of registered voters.

After Republicans had closed up shop in Cleveland, Trump did not receive a bump in the polls. Instead, Clinton continued to hold a one-point advantage over the newly minted Republican nominee.

At the conclusion of the Democratic National Convention Clinton was up by eight. Trump's troubles last week helped her turn it into a 10-point spread in the latest tracker.

An LA Times survey that overlaps with the time period in which NBC did it's polling online, via SurveyMonkey, turned up vastly different results, however.

The news publication has Clinton up by just one point, 45-44, as of Monday evening.

The margin of error on that poll is significantly higher than on the NBC survey. NBC looked at a sample of 11,480 registered voters, lowering its margin of error to plus or minus 1.2 percent from the standard three percent.

The LA Times' rolling poll has a total sample size of 3,200, and it surveys the same group of people repeatedly, at a rate of 300-400 a day.

Other national polls measured sentiment the weekend immediately following the Democratic convention. No other polling has been published yet that captures the national mood a few days later.

Trump tried to redirect on Monday with an economic address in Detroit, Michigan, where he asserted that he'd abolish the death tax, cut the corporate rate and simplify the tax code for individual earners

Trump tried to redirect on Monday with an economic address in Detroit, Michigan, where he asserted that he'd abolish the death tax, cut the corporate rate and simplify the tax code for individual earners.

Clinton said he was 'scrambling' and characterized his proposals as more 'trickle down economics.'

'Don't be fooled, ' she told her supporters. 'He's the same person who can be provoked by a tweet, and who takes apparent pleasure in tormenting protesters at his rallies, a reporter with a tough question, even a crying baby and a Gold Star family.'

Trump's fight with the Khizr and Gazala Khan, the Muslim-American family that appeared at the DNC on behalf of their son, who perished in Iraq in 2004, may have hurt him in the NBC survey.

It showed the Republican taking a large hit with male voters. He still has five points on Clinton in the demographic but that's down from 16 points before the conventions.

Clinton meanwhile shot up 10 points with women. The former first lady is now up by 24 points with voters that share her gender.

Voters without a college degree are also cooling to Trump. They were supporting the ex-reality TV show host over Clinton at the beginning of July by a nine-point margin.

They've since flipped their support to Clinton, giving her four points of padding in the NBC survey that came out today.

Evangelicals are also having second thoughts about voting for Trump, a thrice-married billionaire whose current wife posed nude when she was working as a model in her youth.