Democratic House Minority Leader David Toscano said the reason why more Democrats are running this year is obvious.
The state House went from a 71-49 Democratic majority in 1994 to an 81-39 Republican majority after the 2002 election when districts were redrawn by Republican lawmakers.
But a new analysis of election results by The Associated Press indicates it was Republicans who could have benefited slightly from the way the districts were drawn, contributing to what would become a landslide election for the GOP.
Colorado was one of just eight US states with a Democratic advantage in its lower house districts in the 2016 election, according to an Associated Press analysis.
The amount of partisan advantage favoring Missouri Republicans was fairly typical when compared with other states.
The victor in more than 40 percent of all state Assembly or House races last November ran unopposed by a candidate from the other major party.
The strategy is for the majority party to create as many safe seats for its own candidates as possible. That would make for an expectation of about 65 percent, or 65 seats, going to Republicans in Indiana. New Hampshire has only two districts, both of which were won by Democrats.
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Other districts - such as Beatty's, where 9 of every 10 voters favor Democrats - are virtually impossible for Republicans to win.
"With the current system, obviously the party in charge is drawing the maps to their advantage", he said. But he also agrees partly with Beatty. Colorado's map was drawn by a Democratic-dominated commission that Republicans criticized as "politically vindictive". Their final map, agreed to unanimously, didn't mirror any particular one of those recommendations. Kottkamp, who later served as lieutenant governor, said lawyers warned lawmakers that there were still rules that had to be followed. It also underscores years of legal battles in Texas over redistricting.
Missouri's redistricting office analyzed the new House districts in 2011 by applying a decade of past election results. Democrats won 37 of 65 House seats, theoretically five more than would be expected based on their statewide vote share.
The efficiency gap method was designed by University of Chicago Law professor Nick Stephanopoulos and researcher Eric McGhee at the Public Policy Institute of California. The formula seeks to identify "wasted votes", defined as any vote for a losing candidate or any vote for a winning candidate beyond the 50 percent threshold required to win.
Republicans may have won an extra congressional seat over what would have been expected based on the average vote share around the state that shows a large so-called "efficiency gap".
According to the AP analysis, Colorado's Republican congressional candidates won 51 percent of the statewide vote in November to maintain their 4-3 margin.