Texas Republicans, at President Donald Trump’s urging, are preparing to redraw the state’s congressional map in a way that could flip up to five seats to the GOP in 2026. Trump hopes to boost Republicans’ chances of maintaining a narrow House majority amid the headwinds of the midterm election.The manoeuvre in Texas would be legal and not unprecedented for the state, which also undertook a Republican-driven redistricting in 2003. But Democrats have called the move a partisan power grab and an affront to the traditional practice of drawing new congressional districts every 10 years, after a new Census.But the debate over Texas’s electoral map has also prompted broader questions over the fairness of the way in which voting districts are outlined. And the one state bigger than Texas – California – has caught the attention of Vice President JD Vance.“The gerrymander in California is outrageous,” Vance posted July 30 on X. “Of their 52 congressional districts, 9 of them are Republican. That means 17 percent of their delegation is Republican when Republicans regularly win 40 percent of the vote in that state. How can this possibly be allowed?”So, does California have an unfair map, as Vance said?By the numbers, California is not a dra …