Meghan McCain, the daughter of Arizona Senator John McCain, has called on Governor Jan Brewer to veto an Arizona bill which opponents say would allow businesses to discriminate against gays.

“The state that I grew up in and love so much is literally making discrimination against citizens legal. HOW IS THIS AMERICAN OR RIGHT?!?” McCain tweeted to her more than 246,000 followers.

Brewer said she will decide next week whether to sign the bill, which cleared the Senate on Wednesday and the House of Representatives the following day.

The measure seeks to prohibit the state from taking actions against a person, defined as “any individual, association, partnership, corporation, church, estate, trust, foundation or other legal entity,” who refuses services based on their religious beliefs.

“@GovBrewer please do the right thing for ALL Arizonans and veto SB 1062 or be the governor remembered for legalizing discrimination,” McCain also messaged.

Appearing on CNN Newsroom, House Minority Leader Chad Campbell, a Democrat, stated that the bill was a response to laws passed in Phoenix, Tucson and Flagstaff which prohibit discrimination based on sexual orientation and gender identity.

Chad Griffin, president of the Human Rights Campaign (HRC), the nation's largest LGBT rights advocate, also called on Brewer to veto the bill.

“This bill is bad for business, bad for the LGBT community and bad for all Arizonans,” Griffin said in a statement. “Governor Brewer, who herself described it as very controversial, must veto it and send a strong message that legally sanctioned discrimination has no place in Arizona.”

“When providing a service to the public, a business owner shouldn't pick and choose who they want to provide a service to and who they want to deny. Instead of protecting religious liberty, this bill gives license for discrimination to run rampant across the state,” he added.

Roughly 300 people rallied Friday in Phoenix against the bill.

(Related: Hundreds rally against Arizona bill allowing businesses to discriminate against gays.)