U.S. ready for Tuesday's crucial primaries

The U.S is gearing up for a crucial day of voting in its presidential primary season. Votes and caucuses are being held in Texas, Ohio, Vermont and Rhode Island.

Political insiders are saying it is make-or-break time for Democrat contender Hillary Clinton. If she does not win the big prizes of Texas and Ohio, many believe she w'll be out of the race, leaving the way open for her rival Barack Obama.

On the Republican side Senator John McCain is expected to win all four states and finally clinch his party’s nomination.