The economy remains the top issue for most Americans, but national security and the War on Terror are considered very important by 70% of voters nationwide, the highest level found since September 2007.

That’s up from 64% in April and 60% in February, according to the latest Rasmussen Reports national telephone survey.

Another 24% say national security is somewhat important. Only five percent (5%) say the issue is not very or not at all important.

By comparison, 83% say the economy as an issue is very important, down slightly from April. Another 16% say the issue is somewhat important.

Government ethics and corruption remains in the number two spot, with 79% of voters who say the issue is very important to them, up from 77% last month. This comes as a separate survey shows that only 30% now think most members of Congress are corrupt, which is the lowest level found since June of last year.

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Separate Rasmussen polling shows that voter confidence in the U.S. involvement in the War on Terror is at its lowest level since last summer.

Eighty-seven percent (87%) of voters also are now at least somewhat concerned about the security of nuclear weapons in Pakistan as the radical Islamic Taliban continues to make gains there.

While 78% of Republican voters say national security is a very important issue, 65% of Democrats agree. Seventy percent (70%) of unaffiliated voters say the issue is very important to them.

More voters see the war in Iraq as very important this month, though the levels found over the past three months have been significantly lower than those found last year. Forty-eight percent (48%) now say the issue is very important, compared to 43% in April. From August 2007 to October 2008, however, that number never fell below 55%. Since February, it hasn’t reached 50%.

Fifty-seven percent (57%) of voters say taxes are very important to them, down from 64% in April. Three-out-of-four Republicans (75%) say taxes are a very important issue, but only 41% of Democrats say the same. Most unaffiliated voters (62%) also say taxes are a very important issue.

Social Security is another issue that slipped in importance this month. While most voters (56%) still say the issue is very important, that’s down from 62% in April.

Fifty-three percent (53%) say immigration is a very important issue, showing little change from last month. Voters’ opinions on healthcare, education and abortion also have changed little since April.

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