Or you simply state that 9 of the top 12 have an income tax rate, thus easily linking the increased likelihood of higher unemployment with higher taxes.
Next...
Or how about this - how about we analyze all 50 states? I know that's sort of revolutionary as far as republican thought goes - actually looking at all the data - but let's give it a shot.
Michigan 12.600 4.350
Oregon 12.100 9.000
South Carolina 11.400 7.000
California 11.200 9.300
North Carolina 10.800 7.750
Rhode Island 10.500 8.750
Nevada 10.400 0.000
Indiana 10.000 3.400
Kentucky 9.800 6.000
Florida 9.700 0.000
Ohio 9.700 6.240
Tennessee 9.600 0.000
Mississippi 9.400 5.000
Washington 9.200 0.000
Georgia 9.200 6.000
Illinois 9.100 3.000
Alabama 9.000 5.000
Missouri 8.700 6.000
Alaska 8.500 0.000
Wisconsin 8.500 4.000
New Jersey 8.300 8.970
Minnesota 8.200 7.850
Maine 8.100 8.500
Arizona 7.800 4.540
New York 7.800 6.850
Pennsylvania 7.800 3.070
Massachusetts 7.800 5.300
Delaware 7.700 5.950
Connecticut 7.500 5.000
Colorado 7.500 4.630
Vermont 7.200 5.000
Hawaii 7.100 8.250
Idaho 7.000 7.800
Maryland 6.900 5.500
West Virginia 6.900 5.000
Virginia 6.800 4.000
Texas 6.700 0.000
Arkansas 6.500 7.000
New Hampshire 6.200 0.000
Kansas 6.100 6.450
Montana 6.100 6.900
New Mexico 5.900 5.300
Oklahoma 5.900 5.500
Louisiana 5.800 6.000
Iowa 5.200 8.980
Utah 5.200 1.000
South Dakota 4.900 0.000
Nebraska 4.600 6.840
Wyoming 4.500 0.000
North Dakota 4.200 5.540
This data set has a correlation coefficient of 0.13.
If you elimate the top 10% and bottom 10% outliers - there is actually a negative correlation of -0.26.
In other words - the author is full of crap.