For what it’s worth
Cruz vs Sanders has Sanders winning by 1.5%
Trump vs Sanders has Sanders winning by 7.7%
Over at RCP you there are more details-
http://www.realclearpolitics.com/epolls/2016/president/2016_presidential_race.html
At this point in time that polll is worthless.
I know many independents and democrats who will vote for Trump. NONE of then will vote for Cruz.
This election is about jobs and Trump is much better than Cruz on this issue.