MARC Rider
Conductor
Looks like the contractors had so many overruns and then got hit by the Coronavirus that they want out of the contract unless the state forks over mucho $$$$. It's not clear who's responsible for the overruns or whether the contractor lowballed their bid, nonetheless, they have the state in a bind.
wtop.com
https://www.washingtonpost.com/local/trafficandcommuting/firms-building-maryland-purple-line-say-they-plan-to-quit-the-job-over-disputes-with-the-state/2020/05/01/efafa372-8af1-11ea-9dfd-990f9dcc71fc_story.html (behind a paywall)
Apparently the state and the contractors are still in talks, so it hasn't collapsed yet. If it does, the project is only 40% done, and there will be a lot of construction debris littering Montgomery County.
The moral of the story is don't always take the lowest bid!

Latest problem for Maryland’s Purple Line: The builders want out | WTOP
The companies that are building the 16.2-mile light rail line between Bethesda and New Carrollton n Maryland announced that they are leaving the project.

https://www.washingtonpost.com/local/trafficandcommuting/firms-building-maryland-purple-line-say-they-plan-to-quit-the-job-over-disputes-with-the-state/2020/05/01/efafa372-8af1-11ea-9dfd-990f9dcc71fc_story.html (behind a paywall)
Apparently the state and the contractors are still in talks, so it hasn't collapsed yet. If it does, the project is only 40% done, and there will be a lot of construction debris littering Montgomery County.
The moral of the story is don't always take the lowest bid!