New article from 30-DEC-2016
http://www.insidenova.com/headlines/new-potomac-nationals-stadium-construction-may-face-hurdles/article_51cc7ef4-cdfe-11e6-b02b-27299e5e504f.htmlBut the team might not be able to wait much longer as the county weighs these options. Principi and Lawson both say that Silber told them Minor League Baseball is requiring his team to be out of Pftizner by the end of the 2018 season, though Silber declined to comment on the issue. Jeff Lantz, a MiLB spokesman, also declined to comment on any deadline the league gave the Potomac Nationals.
That sounds like the Carolina League is fed up with the delays well and will not renew the waiver past the 2018 season. Several years ago the Carolina League granted the P-Nats a waiver to continue playing in a venue that fails to meet league standards.