Senior White House and Justice Department officials have already been holding talks aimed at possible legal action against Washington for its new marijuana possession law which took effect Thursday, The New York Times reports.

The law states adults 21 and older can possess up to an ounce of marijuana, but are not allowed to smoke it in public, grow it or sell it.

Colorado passed a similar law last month. The Times reports one option by the feds might be to sue the states on the grounds that any effort to regulate marijuana is pre-empted by federal law.

King County Prosecutor Dan Satterberg said this week that he expected the state to get sued and that the case could end up before the U.S. Supreme Court.

Going after those laws might be a political problem for President Barack Obama, because marijuana legalization has the support of many liberals who helped re-elect him.

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