Compare polls from the same outfit from all the others that they completed. A better baseline.
WMUR (RINOs) usually low ball Trump and they did here. The Margin of Error (MOE) must be pushing about +- 10% here. They only polled ‘209’ people - that’s bad. They got their desired result to push Rubio.
WMUR 2/2 - 2/4 209 LV
WMUR 1/27 - 1/30 409 LV
No doubt Rubes is surging.