Americans are divided over whether non-citizens voting in U.S. elections is a serious problem, but most Americans strongly or somewhat support requiring proof of citizenship in order to register to vote, this week's Economist / YouGov Poll finds.

29% of Americans say non-citizens voting in U.S. elections is a very serious problem, and 16% say it's somewhat serious. Another 16% say it's not a very serious problem, and 27% say it's not a problem at all. 82% of Republicans say non-citizen voting is at least a somewhat serious problem, while only 13% of Democrats do.

Republicans who say they are MAGA supporters are especially likely to say non-citizen voting is a very serious problem: 64% of them say so, compared to 36% of non-MAGA Republicans.

Americans are twice as likely to support as to oppose requiring everyone to provide proof of citizenship in order to register to vote: 59% strongly or somewhat support this, and 29% oppose it.

Almost all (91%) of Republicans support a proof-of-citizenship requirement, while Democrats are divided on the issue: 35% support it and 53% oppose. Independents are more likely to support than oppose such a law (52% vs. 31%).

Support for requiring proof of citizenship is very high among those who say non-citizens voting is a very serious problem (92%) and a somewhat serious problem (88%). Most Americans who say non-citizen voting is not a problem at all oppose requiring proof of citizenship (21% support and 71%) oppose). But the swing group of Americans who say non-citizen voting is a problem but not a very serious one are slightly more likely to support than oppose requiring proof of citizenship (46% vs. 41%).

Requiring proof of citizenship for voter registration is one of the provisions in the SAVE Act, a proposed election law supported by President Donald Trump and being considered by the U.S. Senate.

Another provision of the bill — limiting the use of mail-in ballots to people who are ill, disabled, traveling, or members of the military — is less popular than a proof-of-citizenship requirement. 41% of Americans say the use of mail-in ballots should be limited and 44% say they should not be. Most Democrats oppose this law (14% support it and 76% oppose it) and most Republicans support it (74% vs. 13%). Almost all MAGA Republicans say the use of mail-in ballots should be limited (81% vs. 7%), while non-MAGA Republicans support restrictions in less overwhelming numbers (59% vs. 29%).

Younger adults are less likely than older Americans to support limiting the use of mail-in ballots. Among adults under 30, 26% say the use of mail-in ballots should be limited and 49% say they shouldn't — a margin of -23. Among those 65 and older, 48% support and 43% oppose, a margin of +5.

Image: Getty (Megan Varner / Stringer)

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