Look at the recent Alabama election. A Democrat won most of the votes in the state, and also won most of the votes in every single urban area. And yet applying that state wide vote to the House of Represenatives district map in Alabama, would have still sent one Democrat and six Republicans to House of Representatives in Congress (had it been an election for HoR rather than Senate). Even in the case were Democrats made double digit gains in most counties from the 2016 election, it still would not affect the representation in the House. This is a massive case of voter disenfranchisement.
And while both parties gerrymander, only one party engages in the most obvious and egregiously unfair form of it while benefiting overwhelmingly and disproportionately, hence the lawsuit before the Court. And in the Alabama case, it is blatantly racist as well.
i like that you said that. ive always said that it wouldn't surprise me if d's try suppress vote if it benefitted them. its just that they are fortunate enough that enfranchisement benefits them and is also the right thing to do. i dont mean to equate r's and d's, but just to reinforce the idea that all parties seek to consolidate power and preserve themselves.