DENVER, CO - JANUARY 1: Sam Walsh, a budtender, sets up marijuana products as the 3-D Denver Discrete Dispensary prepares to open for retail sales on January 1, 2014 in Denver, Colorado. Legalization of recreational marijuana sales in the state went into effect at 8am this morning. (Photo by Theo Stroomer/Getty Images)

Americans across party lines say they support Colorado's marijuana legalization law, a new HuffPost/YouGov poll finds. And the poll results show the majority of Americans think efforts to enforce current marijuana laws are not worth the cost.

In the poll, 61 percent of Americans said they support the Colorado law, which, as the poll described it, "makes recreational marijuana use legal but applies a heavy tax on marijuana sales, limits the sale of marijuana only to people 21 years old or older, and makes it illegal to take marijuana out of state." Twenty-seven percent oppose it.

Sixty-eight percent of Democrats, 60 percent of independents and 52 percent of Republicans said they support that law.

Support for the Colorado law crosses party lines despite the fact that a political divide appeared in response to a more general legalization question: "Do you think the use of marijuana should be legalized?" In response to that question, 51 percent of Americans said they think marijuana should be legal, while 37 percent said it should not be legalized. Sixty-two percent of Democrats and 51 percent of independents, but only 36 percent of Republicans, said marijuana should be legalized.

But the poll found other signs that even Republicans aren't entirely on board with efforts to keep marijuana illegal. Sixty percent of Americans, including 60 percent of Democrats, 63 percent of independents and 55 percent of Republicans, agreed with the statement that "government efforts to enforce marijuana laws cost more than they are worth." Only 18 percent overall disagreed.

And by a 54 percent to 29 percent margin, a majority of respondents said they don't think the federal government should continue to enforce its own marijuana laws in states that have made the drug legal. Fifty-five percent of Democrats, 56 percent of independents and a 49 percent plurality of Republicans agreed.

Americans aren't that concerned about some of the major reasons cited in the past for keeping marijuana illegal, the poll shows. Only 32 percent of respondents said they think marijuana use leads to the use of harder drugs, while 50 percent said it does not. And 54 percent of respondents disagreed with the idea that legalizing marijuana will increase other types of crime.

On the other hand, Americans are divided over whether marijuana legalization might decrease road safety, with 38 percent agreeing and 39 percent disagreeing with that statement. And 53 percent of Americans think marijuana legalization would increase or encourage marijuana use among young people.

The HuffPost/YouGov poll was conducted July 11-14 among 1,000 U.S. adults using a sample selected from YouGov's opt-in online panel to match the demographics and other characteristics of the adult U.S. population. Factors considered include age, race, gender, education, employment, income, marital status, number of children, voter registration, time and location of Internet access, interest in politics, religion and church attendance.