The FINANCIAL -- Even a lot of Democrats are wondering if Hillary Clinton was really the choice of party voters last year following the release of a new tell-all book by Donna Brazile, former chairman of the Democratic National Committee.

A new Rasmussen Reports national telephone and online survey finds that only 54% of Likely Democratic Voters believe Clinton won last year’s Democratic presidential nomination fairly. Twenty-seven percent (27%) say the party’s electoral system was rigged against challenger Bernie Sanders, while 19% are undecided.

Among all likely voters, just 32% now think Clinton won her party’s nomination fairly. Forty-seven percent (47%) say the Democrats’ electoral system was rigged against Sanders. Twenty-one percent (21%) are not sure.

Forty-two percent (42%) believe Clinton is less ethical than most politicians, but 18% say she is more ethical than most of her peers. Thirty-six percent (36%) rate her ethics as about the same as theirs. These perceptions are little changed from August of last year during the presidential campaign.

By comparison, only 11% of voters think Sanders is less ethical than most other politicians. Thirty-eight percent (38%) say he is more ethical. Forty percent (40%) of Democrats said in June that the Vermont senator is likely to be the party’s presidential nominee in 2020.

Brazile’s book details how the Clinton campaign had secret control over the party’s electoral apparatus during the election of 2016.

The presidential primary process to choose the Democratic nominee includes the use of superdelegates, individuals selected by the party who can support any candidate at the national convention regardless of who wins their state's popular vote. Many Sanders' supporters were unhappy with this system, arguing that it gave Clinton an unfair advantage. Fifty-one percent (51%) of Democrats opposed the superdelegate system in April of last year.

Women and those under 40 are more undecided about how Clinton won the nomination than men and older voters are. They’re also less critical of her ethical standards.

But younger voters who were a key support group for Sanders are clearly conflicted. Forty-two percent (42%) of these voters believe the party system was rigged against Sanders versus 34% who say Clinton won the nomination fairly.

Blacks are more likely than whites and other minority voters to believe she won the nomination fairly. Forty-one percent (41%) of blacks say Clinton is more ethical than most politicians, a view shared by only 13% of whites and 23% of other minority voters.

A plurality (45%) of Democrats see Clinton’s ethics as about the same as most politicians, a view shared by 20% of Republicans and 42% of voters not affiliated with either major party. Thirty-one percent (31%) of voters in her own party say she is more ethical, but only nine percent (9%) of GOP voters and 13% of unaffiliateds buy into that.

Among voters who rate Clinton’s ethics as comparable to most other politicians, 40% say she won the nomination fairly; 29% think the system was rigged against Sanders, and 31% are undecided.

Sixty-one percent (61%) of all voters believe it is time for Clinton to retire from public life.

With the Clinton Foundation and Clinton’s campaign coming under increasing investigative scrutiny for their ties to Russia, just over half of voters now think something illegal was going on.

Just after the 2016 presidential election, 48% thought the election results were more a vote against Hillary Clinton than a vote for Donald Trump. Thirty-five percent (35%) said they were more a vote for Trump.

But 55% think Trump won the presidential election fairly last November.