Republican presidential front runner Donald Trump and his Democratic rival Hillary Clinton are leading in most of the states, where the primaries are scheduled next week and thereafter, according to latest polls.
The next phase of presidential primaries is very important for both Mr Trump and Ms Clinton as they aim to achieve the target of necessary delegates to become the party's nominee for the November elections.
As per latest opinion polls, Mr Trump is leading by a huge margin of 27 points in California against his nearest rival Senator Ted Cruz from Texas. He is ahead of Cruz in Indiana by eight points.
Hillary Clinton is up by just two points over Bernie Sanders in California likely voters. (Reuters file photo)
However, as per Fox News, the two are tied in a close race in California.
The former secretary of state leads Mr Sanders by four points in Indiana.
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