Most Americans say they support Republican presidential candidate Donald Trump's proposal to temporarily ban Muslims from entering the U.S., according to several polls that asked likely voters.

The majority of those polls were taken before the June 12 massacre at a gay nightclub in Orlando, Florida, by a Muslim shooter who pledged allegiance to ISIS as he gunned down 49 people. The shooter was born and raised in the U.S.

An ongoing Reuters poll showed support for the presumptive Republican nominee's plan dipped slightly from June 6 -- when 52 percent of likely voters said they approve of the plan -- to June 17, when 47.7 percent of respondents said they approve.

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In both cases, supporters of the plan outnumbered those who said they oppose it. Between 42 and 45 percent of likely voters said they oppose the plan in different snapshots over the month, according to Reuters.

Those numbers mirror a late March poll by Morning Consult that found 50 percent of voters polled said they support the billionaire's proposal to stop travel from Muslim nations and to patrol Muslim neighborhoods.

Trump has kept a hard line on his proposal, despite pointed criticism from Democrats and from some within the GOP.

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"Until we are able to determine and understand this problem and the dangerous threat it poses, our country cannot be the victims of horrendous attacks by people that believe only in Jihad, and have no sense of reason or respect for human life," the candidate wrote in a statement in December of 2015, when he first unveiled the proposal.

But not all polls are favorable to the presumptive Republican nominee.

A Brookings Institution poll released on June 23 found Trump's stance doesn't fare as well among independents. Although the survey was released after the Orlando massacre, the polling was conducted before June 12, according to The New York Times.

The poll did not specifically ask about Trump's ban on travel and immigration, but found sharp divides among independents on other Trump proposals, such as building a wall along the U.S.-Mexico border. The poll found that Trump may need to change his tone as he courts independents in the general election.

Trump's proposals were “a winning strategy for the Republican primary but are not connected to where the country is as a whole,” Robert P. Jones of the Public Religion Research Institute told the Times. “If Trump continues to double and triple down on that message, he may run into a wall with independent voters.”

Sources: The New York Times, Reuters, USA Today, Morning Consult / Photo credit: Wikimedia Commons