The top chart represents the results of the latest Rasmussen Poll on the presidential race. It was done on August 23rd and 24th of a random national sample of likely voters, and has a 3 point margin of error. The poll shows Clinton growing her lead to, and for the first time, Rasmussen has it above the margin of error. They give Clinton a 4 point edge over Trump.
The bottom chart is from the Quinnipiac University Poll. It was done between August 18th and 24th of a random national sample of 1,498 likely voters, and has a margin of error of 2.5 points. It shows Hillary Clinton with an even larger 7 point lead over Donald Trump.