What started as so-called “Trump-mandering” last summer quickly became a year-long national political battle between Republicans and Democrats to redraw as many congressional districts as possible in the House of Representives for an advantage going into the midterm elections.
The political pandering is called gerrymandering.
That’s the term to describe the partisan redrawing of congressional boundaries. The saying was popularized in 1812 by the news media following a contentious redistricting decision in Massachusetts (more on that below).
What follows is a scorecard and narrative recap of what you may have missed in the gerrymandering war and how it could impact control of the House when a new Congress convenes in January 2027, following the midterm elections.
Gerrymandering nets a GOP advantage
Currently, Republicans (GOP) hold a small House majority of 218 seats, with 214 seats held by Democrats (Dems), one seat held by an Independent and two vacant seats.
On a technical level, Democrats only need to win five seats for a House majority but that’s not the whole picture.
- It’s important to note that the exact number of gerrymandered seats by either party is based on assumptions and approximations due to several unknown variables two months before Election Day.
Republicans stand to gain about a 10-seat net advantage through gerrymandering, with 16 congressional districts flipped red across eight states. Democrats, by contrast, successfully redrew six districts.
Yet when adding the potential net gain of 10 seats for the GOP, plus their current four seat House majority and one Independent who leans Republican, it’s possible the GOP can net a total of up to 15 seats in the best case scenerio.
The 15-seat advantage is a soft estimate that assumes all the unknown variables fall into place for Republicans, which include winning special elections for two vacant seats, winning pending litigation over redistricting in some states, and then actually winning the redrawn red districts when voters cast their ballots.
Rare to Rampant
In June 2025, Texas Republicans drew first blood by gerrymandering in five congressional districts as part of a strategy championed by President Trump to buttress the GOP’s slim House majority.
But before we get to that, it’s relevant to review what the U.S. Constitution says about redistricting.
According to Article I of the Constitution, a nationwide census occurs every 10 years with reapportionment of congressional seats based on population changes. States handle redistricting within their own borders separately under the Elections Clause; it is traditionally managed at the state level rather than as a purely federal administrative process.
What makes this electoral cycle stand out is that mid-decade redistricting has gone from rare to rampant.
The term “gerrymandering” dates to 1812, when Massachusetts Governor Elbridge Gerry signed off on a state senate district so contorted it was said to resemble a salamander. A newspaper cartoonist dubbed it a “Gerry-mander,” and the name stuck (Smithsonian).
The problem for citizens, in a practical sense, is that gerrymandering allows politicians to choose their voters rather than voters choosing their politicians.
House vs. Senate Showdown
Republicans currently hold slim majorities in the House and the Senate, both of which they want to maintain to implement President Trump’s policy agenda during his final two years in office.
Some political analysts believe that Democrats have a greater chance to retake majority control in the House versus the Senate, despite gerrymandering. That’s because current polls give House Dems a 6% general lead over Republicans if the elections were held today.
Even though Democrats are defending fewer Senate seats overall, most of their Republican-held targets are in red-leaning states where GOP candidates are favored to win. That’s why flipping Senate seats from red to blue is an uphill battle for Democrats: there simply aren’t enough competitive Republican-held “toss-up” seats on the ballot.
Interestingly, even though redrawing congressional maps between decennial censuses has historically been viewed as contrary to standard legislative norms, both parties aggressively embraced gerrymandering.
Although Republicans fired the first shots in Texas, Democrats countered where they held full political power, most notably in California.
What began as a border skirmish in the Lone Star State quickly became a full-blown redistricting war nationally, one that will shape not only this year’s midterm elections but also the 2028 presidential and congressional elections.
“Trump-Mandering”
In the summer of 2025, President Trump launched a national political strategy to redraw congressional maps in Republican-controlled states ahead of the midterms. This was a blatant strong-arm tactic to protect the Republicans’ small majority in Congress or, at minimum, soften potential losses.
Democrats labeled the effort “Trump-mandering” to highlight the president’s direct involvement. While state legislatures hold the constitutional authority over election district boundaries, presidential pressure on state redistricting breaks long-standing political conventions.
The “Trump-mandering” moniker never fully took hold, in part because critics called it hypocritical given Democrats’ own history of aggressive gerrymandering. Nevertheless, the fight spread from Texas to roughly a dozen states, leaving voters to live with the fallout within their local congressional districts.
What looked like an uncertain political landscape last year has now come into focus: both parties tried to bend the maps in their favor, but one only side executed the strategy more effectively.
In the end, Republicans won the redistricting fight.
“While the GOP has already drawn itself more favorable lines in 16 districts since last year, Democrats have only picked up an advantage in six more,” according to The Washington Post.
While the exact net gain of seats attributed to redistricting won’t be known until the election results are announced, it’s clear the GOP came out ahead.
One year later, President Trump’s strategy appears to have paid off, with Republicans gaining a net advantage of about 10 congressional districts by gerrymandering.
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Previously Published on Medium
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