True, but you can't run an airline based on what another airline might do in the future since the possibilities are almost unlimited. If Republic starts up a BOS/LGA/DCA shuttle operation as Midwest, Parker made a mistake. On the other hand, if the whole purpose was to reduce debt US has bigger problems than whatever Republic may do with the 190's. Merger purposes - look at every other legacy carrier and the hole they have in their fleets around the 100 seat area. AA with nothing between the MD80's/738's and Express, UA with nothing between the A319's and express (once the 735's are gone if they aren't already), DL has NW's DC9's which are expensive to operate - the 190's would make an excellent replacement, CO has 735's like UA but they're also on the way out - the 190 would make just as good a replacement as they would for DL. Absent bankruptcy it's unlikely that the pilots at any of those carriers will allow scope relief to fill those holes, so the 190 could be an attraction to a potential merger partner.
Jim