Mackay has shown incredible strength and speed in her last two races. At USA Indoor her closing 1500 was 4:03. She put away ESP in the last 100, which simply rarely happens. Her closing lap this last weekend to grab Silver at Worlds was a 58.6. Running down Hull. Something even Hiltz couldn’t do a night later (and Hull was on her 3rd race).
Combine that with her 1:57/14:45 range and I believe we are seeing the ingredients for an American Record this summer in both the 1500 and 3000.
Mackay, an afterthought just a few months ago, has stepped into the light as the real threat to the American 1500 record. And I can see it going down by a couple of seconds.