A panel of Missouri appeals court judges released new boundaries for Missouri
House and Senate districts Wednesday based on the 2010 census, saying
some “significant changes” were necessary to account for population
shifts during the past decade.

The new maps that reshaped districts across the state will take effect for 2012 elections,
potentially pitting some incumbents against each other and, in some
cases, forcing majority-party Republicans to defend some seats that now
will have a majority of Democratically inclined voters.

and this:

From a partisan perspective, Republicans appeared to keep their advantage in the new maps based on voting patterns from the 2002-2010 elections.

Republicans currently hold a 26-8 majority over
Democrats in the Senate. An analysis released with the new maps shows
that Republican-inclined voters comprise the majority of residents in 23
of the new districts, compared with 11 for Democrats. The voting-trend analysis, released along with the maps, was based on results from federal and state elections from 2002 to 2010.

House Republicans currently hold a 106-57 majority over
Democrats — a tally which includes one Democrat who was elected as an
independent. The analysis of the new House boundaries shows 102
Republican-inclined districts and 61 Democratic-inclined districts.

The full story can be found here.