Polls
are rolling out almost daily. They persistently show Republicans
Donald Trump at or near the top of his party’s contenders and
Democrat Hillary Clinton running away with the Democratic race.
But
the polls are probably wrong. In fact, they may be so far off the
mark that we will have to wait for the primaries to know the real
frontrunner. Unfortunately, beliefs about candidate strength, based
on dubious polling, could influence voter turnout and preferences.
One
of the major factors strongly influencing the value of a poll is the
ability of the polling organization to develop a sample of people
that validly represents the “universe” of people whose opinions
are being measured.
The
best way to achieve this goal is the purely random selection of
participants from a large number of people. For example, picking
every tenth name from a list of 1,000 people would produce a “random
sample” of 100 people.
But
let’s say that of the 100 people called, 90 refused to be
questioned. The polling organization would then have to pick 90 more
and so on until it had 100. But its sample would not be nearly as
truly random as the first 100 selected.
While
refusing to participate in a survey used to be rare, the example of
only 10 percent of the original selection agreeing to be questioned
is reportedly not unusual these days.
Most
surveys are conducted by phone. Some people don’t have phones.
Some people won’t answer the phone except for calls from known
callers. Many people primarily use cell phones, which by law cannot
be automatically called randomly. All this makes it more difficult
to get a fair sample.
And
pollsters typically give some people interviewed more weight than
others. For example, if the 100 people happen to include 60 women
and 40 men, the value of any person may be changed to produce a
result better reflecting the proportion of women and men in the
survey universe.
Increasingly,
polling depends on people, like those with cell phones, volunteering
to participate and the pollster later weeding out answers until it
gets to the correct number and type of people for the sample. That
would hardly pass the traditional “scientific” survey standard.
And,
in the case of the 2016 presidential contest, the matchup between
candidates assumes the election takes place today. What’s missing
is the key final and usually heated phase of the campaign when many
people decide whether they will vote and, if so, for whom they will
vote.
It’s
likely that many people have not yet paid much attention to the
campaign. Those that have followed it have heard more about campaign
tactics than the issues. That could cause them to decline to respond
to polls or give answers that will change as they approach the
election.
In
addition to all of the weaknesses of polling, which are increasingly
undermining their accuracy, this year in the Republican race, there
is a major complicating factor: too many candidates.
Trump
may be leading in the polls, but about 70 percent of those surveyed
favor somebody else. The rest of the field is split among more than
a dozen others. The race might look different, if it Trump faced
only one or two others.
Will
the field thin out? Often by this point in previous races that had
happened, as poor polling results discouraged contributors from
supporting candidates who appeared to have little or no chance.
Now,
thanks to the Supreme Court’s Citizens United decision, immensely
wealthy people can contribute unlimited sums to support their
candidates. So long as one billionaire sticks with one hopeful, that
candidate can stay in the race. Of course, Trump bankrolls himself.
Because
several candidates have political sugar daddies, they stay in the
race despite low poll numbers. That reduces the likelihood of any of
them emerging as the alternative to Trump. Facing a divided field,
Trump has remained the frontrunner.
In
other words, big money, most of it going to other candidates, serves
to keep Trump at the top of the race.
The
voters themselves may have to weed out the field. Recently, in the
Canadian elections, when the anti-Conservative vote appeared to be
split, which would have allowed the Conservatives to stay in power,
voters defied the polls and just before the election settled on one
of the two alternatives, giving it a big victory.
The
weakness of polling and the misleading influence of money suggest
that just who is the frontrunner may be a lot less clear than it
seems.