Sanders made the comments during a campaign stop in Baltimore, Maryland ahead of the 26 April primary.
The Republican frontrunner's comment caused quite an uproar among his rivals.
Cruz said on 20 April that neither he nor Donald Trump could win the nomination outright.
A campaign memo predicts the GOP frontrunner will clinch the nomination by first round of balloting.
Wins give campaign boost ahead of the 26 April primaries in 5 states.
There are 95 delegates available to Republicans and 247 delegates available to Democrats.
Fans of Republican Party frontrunner mocked relentlessly by Swedish online community.
US presidential hopeful was behind 76-page court brief that equated sale of adult devices to promoting prostitution.
Trump lashes out again after rival Ted Cruz swept all of Colorado's 34 delegates.
Her lawyer releases names of entities from FBI to State Department that allegedly used escort service.
Former president has refused to apologise for public argument while campaigning for his wife.
In the clip shared by the Daily Show, Trump commented on his infant daughter's breasts.
Sanders and Clinton will vie for 14 Wyoming delegates ahead of the all-important New York primary.
Trump later reversed himself to say doctors who provide abortions should be held responsible.
Both candidates believe they can surpass the party frontrunners to nab the nominations in July.
42 Republican delegates and 86 Democratic delegates were up for grabs in Wisconsin.
The National Enquirer claims the Texas senator cheated on his wife with five women.
The case would have significant implications for states with populations ineligible to vote.
The Republican frontrunner claims Kasich is taking votes away from him.
There are 86 delegates available to Democrats and 42 delegates for Republicans in the next primary.
The businessman is working hard to recapture the limelight after a difficult week of campaigning.
Sanders' message is that real change is possible, but Clinton basically says that this is as good as it gets.