Scott Walker Keeps Lead as Jeb Bush Struggles in Latest Iowa Polling

Jeb Bush's standing in the poll dropped five points from the 10 percent he recorded in February, while Marco Rubio's has risen nine points and Ted Cruz's has moved up 7 points.

Scott Walker, governor of Wisconsin, speaks during the Conservative Political Action Conference (CPAC) in National Harbor, Maryland, U.S., on Thursday, Feb. 26, 2015.

Photographer: Andrew Harrer/Bloomberg

Wisconsin Governor Scott Walker continues to lead prospective and declared 2016 Republican candidates in Iowa, while former Florida Governor Jeb Bush has lost ground, a Quinnipiac University poll shows.

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