DC is just far away for Fresno it kinda reminded me of how the sky socks lost the Rockies and they eventually moved to single a The angles or dodgers I thought where logical affiliations.
I can see why you'd think that, but it's not as critical as you think. Firstly, a few things about the Colorado Springs situation - the Sky Sox didn't move down to Single-A, their successor team, the Rocky Mountain Vibes, are in Short Season A, which is a distinct classification difference from Single-A.
More to the point, the relocation of the Triple-A Sky Sox franchise to San Antonio had little to do with the affiliation change and a lot to do with Elmore Sports Group, the Sky Sox's owners, wanting a new ballpark and Colorado Springs not giving them one. San Antonio, meanwhile, promised a new park if ESG, who also owned the Double-A San Antonio Missions, would move the Triple-A franchise to San Antonio.
As for Fresno, the PDC with the Nationals is up in 2020 and at that time either they or Washington can choose to seek another parent/farm if either side feel that it's not working out. Barring any drastic change of fortunes, I don't think you're going to pry the Angels out of Salt Lake and the Dodgers own their Triple-A team in Oklahoma City so neither of those are options. No idea who might be interested in a Fresno affiliation in 2020, but as of now, the Toronto/Buffalo, Chicago (AL)/Charlotte, Cleveland/Columbus, Tampa Bay/Durham, Pittsburgh/Indianapolis, Philadelphia/Lehigh Valley, Cincinnati/Louisville, Baltimore/Norfolk, Minnesota/Rochester, Detroit/Toledo, Oakland/Las Vegas, Miami/New Orleans, Arizona/Reno, San Francisco/Sacramento, and Milwaukee/San Antonio PDCs are up for renewal that season, along with Washington/Fresno.
The distance issue isn't as much of a factor, especially at the Triple-A level. Heck, Las Vegas was affiliated with two different Eastern teams (the Mets and the Blue Jays) for a decade, Florida/Miami's been affiliated with New Orleans for a decade (and before that they were with Albuquerque), and Rochester and Minnesota have been affiliated with each other since 2003. What you typically see in those instances is the Double-A team being the
de facto top farm team and more prospects being drawn from there. I'm not quite sure how the Nationals are treating the Grizzlies (offhand I think I saw 2 of their Top 10 prospects on the Grizzlies roster) but it doesn't seem to be hurting them in the standings (2nd in their division, half a game behind division-leading Tacoma) or at the box office (averaging about 5,846/game, good enough for 8th in the 16-team Pacific Coast League - comparatively last season they averaged 6,051/game, which was 9th in the League).