This poll confirms it: Immigration is all Republicans have left

Immigration shot to the top of Gallup's February polling on what Americans say are the country's most vexing problems, finishing at 28%, an 8-percentage-point uptick in a single month. 

Here were February's top five issues, compared with January's:

1. Immigration: 28% (+8 points from January) 

2. Government: 20% (-1 point)

3. Economy in general: 12% (unchanged)

4. Inflation: 11% (-2 points)

5. Poverty/Hunger/Homelessness: 6% (+1 point)