A rewrite of Pennsylvania's congressional map cleared another hurdle Tuesday when a Senate panel voted to advance the proposal with court battles and key deadlines looming, Spotlight PA and Votebeat report.

The panel's Democratic chair, state Sen. Sharif Street of Philadelphia, said he would not vote for the map in its current form but appreciated "the spirit in which we're moving forward." Experts say the map, which was first proposed by House Republicans, has a clear GOP advantage.

And with the clock ticking and disagreements remaining, it has become increasingly likely that the final map will be determined by the state courts.

THE CONTEXT: There are two major deadlines facing lawmakers and Gov. Tom Wolf — who has final say over the map, and who has expressed displeasure with the current pitch while offering up one of his own.

The first is Jan. 24, a date by which the state's top election official said her department would need a final map in order to meet a spring primary deadline.

The second is Jan. 30, the point at which Commonwealth Court is set to take over the process if Wolf and lawmakers can't agree. 

While redistricting reform groups said the GOP-advanced map does not reflect the state's partisan makeup, Wolf's proposal does, per nonpartisan metrics.