Donald Trump easily won the Michigan and Mississippi primaries.
But Bernie Sanders stunned Hillary Clinton with a surprise win in Michigan,.
Contest were also held for Republicans in other states - Idaho held a Primary and Hawaii a caucus.
Our U.S. correspondent Priscilla Huff reports:
IN: " Bernie! Bernie! ....
OUT: SOC
DUR: 3:00
****
TAKE SOUND UP BERNIE CHANT
TRACK
Hundreds, even thousands keep showing up for Bernie Sanders rallies
and they showed up at the polls in Michigan....
turning what was supposed to be a short road to the White House a long journey for Hillary Clinton.
Bernie Sanders thinks he's got momentum.
TAKE SANDERS CLIP
TRACK
Hillary Clinton easily won the Mississippi primary - taking 83 percent of the vote.
But the extremely close results in Michigan helped show
In a diverse state - she still faces opposition, even at her own campaign rallies.
TAKE CLIP
TRACK
The Republicans are also worried that their party is dividing, fracturing.
Marco Rubio is passionate about his chances, despite his poor showing.
TAKE CLIP
TRACK
And even though Ohio governor John Kasich came in a strong second in Michigan,
Ted Cruz is still dismissing his campaign....
but a win in Idaho probably won't be enough for his campaign to regain the momentum it had just a few days ago.
He thinks the focus should be on defeating the likely Democrat opponent
TAKE CLIP
TRACK
Donald Trump is trying to reassure the Republican party, he can not only endorse the people they've already elected to office,
he can be the mature, reliable man they need in the White House.
TAKE CLIP
TRACK
In a few days, American territories including Guam and the District of Columbia hold contests.
But the real focus is on Super Tuesday round 2
That's when winner take all primaries in large, heavily populated states of Florida, Ohio, Missouri, Illinois and North Carolina take place
and many think...will be the deciding factor for the eventual Democrat and Republican nominee
Priscilla Huff, Washington
***ENDS***