A New York appeals court docket choose on Friday signed off on the appointment of a impartial skilled to organize new congressional district traces that may very well be used if the state’s highest court docket upholds a lower-court ruling that struck down maps drawn by Democratic lawmakers.

The choose, Justice Stephen Okay. Lindley of the Fourth Appellate Division, emphasised in his choice that the substitute maps would solely be a backup measure meant to protect a variety of potential treatments because the courts think about a broader authorized problem to the maps introduced by Republicans.

However Justice Lindley’s directive raised the specter that an more and more tangled struggle over New York’s freshly drawn congressional districts might but veer away from Democrats months after they enacted a map that favors their candidates in 22 of 26 districts, and require the state to delay this yr’s main contests from June till August.

The political stakes are excessive: With the 2 events locked in a nationwide battle for management of the Home, the swing of only a few seats in New York might theoretically be the distinction between a Democratic or Republican majority in Washington subsequent yr.

To date, just one trial court docket choose — a Republican from rural Steuben County — has weighed in on the case. The choose, Patrick F. McAllister, struck down the entire state’s legislative districts final week as a violation of a 2014 state constitutional modification that outlawed partisan gerrymandering. He ordered lawmakers to redraw the traces with bipartisan help or hand the method over to a particular grasp.

Democrats appealed the choice they usually consider they’ll prevail at both the Appellate Division or on the New York Court docket of Appeals, the state’s highest court docket. They argue that the maps’ partisan tilt displays the make-up of a closely Democratic state like New York, not an try and skew the traces for partisan benefit.

Justice Lindley supplied for that chance, too. Whilst he gave Justice McAllister approval to nominate a particular grasp to create “standby” maps, Justice Lindley opted to maintain in place a keep on many of the lower-court ruling, successfully permitting the election to proceed below the present district maps for now.

“The keep will, amongst different issues, enable candidates for Congress, State Senate and Meeting to file designating petitions by the statutory deadline, and permit the boards of elections to simply accept such petitions,” he wrote.

If the courts finally discover that the maps violate the State Structure, the primaries would proceed as deliberate in June. If the maps are struck down, the courts must resolve whether or not to delay the primaries and order substitute maps, or enable this yr’s contests to go ahead as scheduled utilizing the Democratic traces and wait till the subsequent election cycle — or schedule particular elections — to repair them.

A closing choice is predicted across the finish of April.

Permitting a particular grasp to start engaged on backup traces now could improve the probabilities that the courts might lock in place substitute maps earlier than this yr’s elections in the event that they rule in opposition to Democrats. The Legislature would virtually definitely be given a chance by the court docket to appropriate them first.

Michael Li, senior counsel for the Democracy Program on the Brennan Middle for Justice, referred to as Justice Lindley’s order a “logical step.”

“Too typically, map drawing will get put utterly on maintain after which by the point a case is determined, there isn’t sufficient time to redraw maps,” Mr. Li mentioned. “However that doesn’t imply the state of affairs isn’t messy for lawmakers and much more so for individuals operating for workplace.”

A court-appointed particular grasp drew New York’s congressional traces in 2012 over the last redistricting cycle. In that case, a federal court docket took over the method as a result of the State Senate and Meeting — which had been then managed by Republicans and Democrats, respectively — merely couldn’t agree sufficient to approve any Home district traces.

Democratic attorneys had argued at a listening to on Thursday in opposition to appointing a particular grasp this yr earlier than a closing choice is reached. Legal professionals for the plaintiffs, New York voters supported by nationwide Republican teams, took the alternative place.

On Friday, each events appeared proud of Decide Lindley’s choice. Mike Murphy, a spokesman for Senate Democrats, didn’t say whether or not lawmakers would think about drafting new maps earlier than a closing ruling, as Justice Lindley had urged them to do.

“We’re happy the keep is sustained, permitting the election to maneuver ahead, and we look ahead to being heard on the attraction within the subsequent couple of weeks,” he mentioned in a press release.