President Obama’s State of the Union call for every state to require students to stay in school until they turn 18 is Washington’s first direct involvement in an issue that many governors and state legislators have found tough to address.

While state legislative efforts to raise the dropout age to 18 have spread in recent years, many have had trouble winning passage. Last year, for example, such legislation was considered in Alaska, Illinois, Kentucky, Maryland and Rhode Island — but only Rhode Island actually changed its law.

“Efforts to raise the age usually come up against the argument that requiring students to stay in school when they no longer want to be there is disruptive to other students and not fair to the teacher,” said Sunny Deye, a senior policy analyst at the National Conference of State Legislatures. “Home-school groups often oppose raising the compulsory attendance age, and especially now, in this budget crunch, there are major concerns about the fiscal impact.”

In Kentucky, where the dropout age of 16 was set in 1934, legislation to move the age to 18 has failed twice. Gov. Steven L. Beshear’s State of the State message this month made another push.