[oldsalt]

IIRC weren't the original Senators,now Twins, often referred to as the Nats?

Seems to me they were, but I'm getting to be advanced into geezerhood and can't say for sure.

[Boiler Plate]

IIRC weren't the original Senators,now Twins, often referred to as the Nats?

You are almost correct on both counts. They were called the Gnats because of the proliferation of the bugs during the spring and summer here in DC. Gnats were definitely the worst part of playing baseball around here.