Donald Trump jumped to a 17 point lead over Senator Ted Cruz in the latest Gravis Indiana poll:
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Gravis Marketing, a nonpartisan research firm, conducted a random survey of 379 likely Republican Primary voters in Indiana. The poll was conducted from April 28th to the 29th and has a margin of error of ± 5% at a 95% confidence level. The total may not round to 100% because of rounding. The polls were conducted using live telephone calls to landlines and mobile phone numbers of registered voters in Indiana and weighted by anticipated voting demographics.