It seems that your history is a little deficient, I'm afraid.
The Martin B-26 Marauder came out, more in the vein of the traditional bomber (straight and level, higher altitude). The Douglas A-26 was put into service shortly thereafter, with an operational focus more on "down and dirty" mud-moving. The Marauder was phased out of USAAF inventory by the end of WW2 (last combat mission for the Marauder was May 1945; my "1948", above, was incorrect). In 1948, the designation for the Invader was changed from A-26 to B-26. The actual planes didn't change, just their designation; A lot of B-26 Invaders served as A-26 Invaders during WW2, just a few years earlier.
The Marauder never had the maneuverability that was part of what enabled the Invader to be used against fighters, and except for a relative few airframes didn't have the heavy forward firepower of the primary Invader model during WW2, the A-26B.
As for the Nighthawk's air-air capability,
the Air Force disagrees.
From the spokesman for Holloman AFB, which will be switching out its F-117s for F-22s: