The Minnesota Senate has sent Gov. Mark Dayton bills that alter the boundaries of Minnesota’s eight congressional districts and House and Senate legislative districts, but they are likely to draw a veto from the Democratic chief executive.

The bills passed the Senate Tuesday with support only from majority Republicans. Dayton has said he would not support redistricting bills that lack bipartisan support. If he vetoes the bills, the entire process is thrown into the courts.

The GOP congressional map lumps all of northern Minnesota into one district and creates three districts that stretch across the state. The legislative map pairs up more Democratic incumbents into one district than it does to Republicans. Democratic lawmakers have called the maps partisan.

Under the proposal, Freeborn County and the southern part of Faribault County would be combined to form House District 21A.

Mower County would be under House District 26A, along with a southwest portion of Fillmore County. Steele County and a portion of Dodge County would form House District 22B; Blue Earth and Waseca counties, along with the northern part of Faribault County, would be combined as House District 21A.

Legislators aim to have just under 40,000 people in each House district.

The Senate redistricting proposal splits up Albert Lea and Austin so that Mower, Fillmore and Houston counties would be considered Senate District 26. Freeborn, Faribault, Blue Earth and Waseca counties would be combined to form Senate District 21.

District 27 state Sen. Dan Sparks said though he would be happy to represent whatever district he’s given, he voted against the proposal because he thought legislators should have been collecting input from the public as the proposals were created.

“Ultimately there shouldn’t be a Republican map or a Democratic map, but a map based on a transparent process,” Sparks said.

Redistricting occurs every 10 years after the census produces new population figures.

Political boundaries are reconfigured to put roughly the same number of Minnesotans in each of the 134 House districts and 67 Senate districts.

The new district maps must be in place by February 2012, in time for the elections that fall. The new districts will be represented in 2013.