Labeling for GMOs, Jeff Merkley and marijuana are all looking strong for the November ballot.

A poll released today by KATU and SurveyUSA found a narrow majority of likely voters—51 percent— would back the legalization of recreational marijuana use. The poll found 41 percent were opposed. The support was especially strong among younger voters and Democrats. Seniors and Republicans oppose legalization. 

There are three initiative petitions that would legalize that could make the November ballot.

Incumbent U.S. Sen. Jeff Merkley (D-Ore.) leads Republican Senate nominee Monica Wehby by a 50- percent to 32 percent. The poll shows women voters support Merkley by a 21-percent margin. That runs counter to a poll released this week by Wehby's campaign, The Hill reports, that closes Merkley's overall margin to 2 percent over Wehby.

Voters are also likelt to decide on a measure that would require labeling some GMO foods. The poll found 51 percent of voters would support the idea to 15 percent who are opposed. Another 35 percent aren't sure how they would vote.

The poll of 560 likely voters has a margin of error of plus or minus 4.2 percent.