American voters in Arizona and Utah are set to vote in primary elections, while Democrats will caucus in Idaho.
Both Hillary Clinton and Donald Trump hope to cement their leading positions.
Ahead of the vote, foreign policy took center stage, as our U.S. correspondent Priscilla Huff reports:
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Arizona's population has boomed thanks in large part to a large population of retirees and those seeking warm weather.
Utah is home to America's conservative Mormon Population
And Donald Trump is convinced, wins in these states will put him on the easy path to the Republican party nomination.
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Ahead of the vote, Donald Trump returned to Washington
in part to start establishing his bona fides as the inevitable nominee
meeting with the Washington Post editorial board
and telling them, nation building doesn't work and the damaging effects of trade.
But it's his bluster on foreign policy that keeps winnning criticism
especially from his likely rival, Hillary Clinton
who addressed AIPAC
the annual gathering of the Jewish American community
who's conference is so large this year - the speeches were in a sports stadium
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All three remaining Republican candidates would take center stage at center court
including Ted Cruz - who is trying to make the argument he is the legitimate alternative to Donald Trump
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But Donald Trump was ready with his own priorities for foreign policy.
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On the democrats side, Bernie Sanders remains a thorn for Hillary
He's just won the support of Democrats living over seas,
winning nearly 70 percent fo the nearly 35,000 votes cast
But with Hillary Clinton and Donald Trump hoping the upcoming contests in Utah and Arizona and the caucus in Idaho will cement their front-runner status
those two campaigns are increasingly focusing on the other and ignoring the rest of the field
and the forecast is for a tough and ugly general election campaign.
Priscilla Huff, Washington
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