He's not just going after Republican votes. He's going after GW haters and tying Jebbie to GW. There are a LOT of GW haters.
Plus, in case you guys haven’t noticed, it’s not 2001 anymore. A whole generation of voters now believe the whole Iraq thing was a big mistake. If ANYONE thinks the GOPe is benefitting from defending that, wow. Those days are long gone and Trump knows it.