Three states are holding Democratic presidential nominating contests on Saturday where Hillary Clinton will try to expand her lead in the contest to secure the party's nomination.
Bernie Sanders is hopeful that he could pick up wins in Washington, Alaska and Hawaii. While few public polls are available, all three contests on Saturday are being conducted with caucuses, a format that has favored the Vermont senator.
As he struggles to remain competitive, western states have become must-win for Sanders, who lost by large margins in earlier contests in the South. Sanders and Clinton are competing to represent the Democratic Party in the November 8 presidential election.
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Clinton holds a sizable lead in the delegates race against Sanders. She has won 1,223 compared to Sanders' 920.
The latest Reuters/Ipsos poll shows Clinton and Sanders are virtually tied nationally.
Clinton has 47 per cent of the Democratic vote, barely edging out Sanders at 46 per cent. The poll, which was conducted last week, surveyed 1,249 likely voters. It has a credibility interval of 3.2 percentage points.
