Topeka ? A Rasmussen poll of 500 likely Kansas voters shows U.S. Sen. Sam Brownback, R-Kan., with a 55 percent to 33 percent lead over state Sen. Tom Holland, D-Baldwin City, in the race for governor.

The poll, with a margin of error of 4.5 percentage points, was conducted last Wednesday, a week after Holland officially announced his candidacy.

The poll showed Brownback had a 58 percent favorable rating, while Holland had a 34 percent favorable, with 43 percent not familiar enough with him.

Gov. Mark Parkinson, a Democrat who has said he will not run for election to the state’s highest office, had a 58 percent approval rating while President Barack Obama, also a Democrat, had a 58 percent disapproval rate.