TOPEKA, Kan. (AP) -- The Kansas Senate is preparing to debate a bill redrawing the districts of its members, an issue that has caused a bitter dispute among majority Republicans.

Some GOP conservatives believe the bill is designed to protect the Senate's current Republican leaders by averting primary challenges to some incumbents.

The measure on Tuesday's agenda draws at least three conservatives out of the districts of the moderate incumbents they plan to challenge.

Supporters of the plan argue that they drew the lines where they made sense, without considering where challengers lived. Backers of the plan also say alternatives are designed to ensure that conservative Republicans gain control of the Senate.

The Legislature is redrawing its districts to account for changes in population over the past decade.