8/28/15, "Ipsos/Reuters Poll (August 28): Core Political Approval," ipsos-na.com
"Donald Trump continues to hold a clear lead in the Republican primary,
with support from 30% of Republicans in our tracking poll this is a new
high for “the Donald” and 20 points higher than the next Republican. The
top 4 Republicans (with Republican voters) are: 1) Trump; 2) Huckabee;
3) Carson; 4) Bush."...
Trump also leads among Independents, the only Republican in double digits (page 7):
"These are findings from an Ipsos poll conducted for Thomson Reuters
August 22-26, 2015. For the survey, a sample of 1,152 Americans,
including 455 Democrats, 415 Republicans, and 155 Independents ages 18+
were interviewed online. The precision of the Reuters/Ipsos online polls
is measured using a credibility interval.
In this case, the poll has a credibility interval of plus or minus 3.3
percentage points for all adults, 5.2 percentage points for Democrats,
5.5 percentage points for Republicans, and 9.0 percentage points for
Independents. For more information about credibility intervals, please
see the appendix.
The data were weighted to the U.S. current population data by
gender, age, education, and ethnicity. Statistical margins of error are
not applicable to online polls. All sample surveys and polls may be
subject to other sources of error, including, but not limited to
coverage error and measurement error. Figures marked by an asterisk (*)
indicate a percentage value of greater than zero but less than one half
of one per cent. Where figures do not sum to 100, this is due to the
effects of rounding. To see more information on this and other
Reuters/Ipsos polls, please visit http://polling.reuters.com/."