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WASHINGTON (CBSMiami/AP) –Carly Fiorina, former technology executive, announced she’s running for president. Retired neurosurgeon Ben Carson was set to launch his bid as well Monday, as the Republican field of hopefuls expands once more.

Both Fiorina and Carson have the potential to help the GOP win over a more diverse group of supporters in 2016.

Fiorina is likely to be the only prominent woman to seek the GOP nomination, with Carson the only likely African-American. They are both also political outsiders in a field likely to be dominated by governors, former governors and senators.

The two are not considered political allies and the timing of their announcements, planned weeks ago, is coincidental.

Carly Fiorina, former CEO of the Hewlett-Packard Company and president of Fiorina Enterprises, delivers remarks at a discussion entitled "Welcoming Every Life: Choosing Life after an Unexpected Prenatal Diagnosis, focusing on caring for children with Down Syndrome," organized by the Heritage Foundation and the National Review Institute in Washington on January 20, 2015.   AFP PHOTO/NICHOLAS KAMM        (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)

Carly Fiorina, former CEO of the Hewlett-Packard Company and president of Fiorina Enterprises, on January 20, 2015 in Washington. AFP PHOTO/NICHOLAS KAMM (Photo credit: NICHOLAS KAMM/AFP/Getty Images)

Fiorina, 60, chose a nationally broadcast morning network news show to announce her candidacy, and she also posted a video.

The former chief executive of Hewlett-Packard Co., appearing on ABC’s “Good Morning America,” said she understands “executive decision-making.”

She also criticized Democrat Hillary Rodham Clinton, the front-runner for her party’s nomination, for a lack of transparency, including the use of a private email server while secretary of State and foreign donations to her family’s charitable foundation.

“I have a lot of admiration for Hillary Clinton, but she clearly is not trustworthy,” Fiorina said.

Carson also got ahead of himself on Sunday, confirming his plans to run in an interview that aired on an Ohio television station.

“I’m willing to be part of the equation and therefore, I’m announcing my candidacy for president of the United States of America,” he told WKRC-TV in Cincinnati.

Carson, 63, is scheduled to make his formal announcement Monday in a speech from his native Detroit shortly after having breakfast at a local museum of African-American history.

Ben Carson (Photo By:Andrew Burton Getty Images News)

Ben Carson (Photo By:Andrew Burton
Getty Images News)

Both candidates begin the race as underdogs in a campaign expected to feature several seasoned politicians, among them former Florida Gov. Jeb Bush, Wisconsin Gov. Scott Walker, Florida Sen. Marco Rubio and Texas Sen. Ted Cruz. Yet while they have claimed much of the early attention and favor from donors, the GOP race is a wide-open contest that could ultimately feature as many as two dozen major candidates.

The Republican field is already more diverse than it was four years ago. Rubio and Cruz are each vying to become the first Hispanic president. And most of the candidates are in their 40s and 50s.

Still, the Republican National Committee has acknowledged a pressing need to broaden the party’s appeal beyond its traditional base of older, white men. President Barack Obama won re-election in 2012 with the strong support of women and ethnic minorities, who are becoming a larger portion of the American electorate.

Raised in Detroit by a single mother, Carson practiced medicine and served as the head of pediatric neurosurgery for close to three decades at Baltimore’s Johns Hopkins Children’s Center. He gained national renown in conservative politics after condemning Obama’s health care law at the 2013 national prayer breakfast.

He has established a strong base of vocal support among tea party-backers, some of whom launched an effort to push Carson into the race before he set up an exploratory committee earlier this year.

Yet he has stumbled at times in the glare of national politics. He has suggested the Affordable Care Act is the worst thing since slavery, compared present-day America to Nazi Germany, and called problems at the nation’s Veterans Affairs hospitals “a gift from God” because they revealed holes in the country’s effort to care for former members of the military.

Fiorina, meanwhile, has a resume more likely to draw support among the Republican establishment. The former business executive became a prominent figure in Republican politics in 2010, when she ran for Senate in California and lost to incumbent Sen. Barbara Boxer by 10 points.

Both Carson and Fiorina are launching national tours in early voting states.

Carson is scheduled to spend the first three days of his presidential campaign in Iowa, before heading to South Carolina at the end of the week and New Hampshire and Nevada the next.

Fiorina’s first post-announcement public event is scheduled for Tuesday in New York City, although she will campaign in Iowa, New Hampshire and South Carolina by week’s end.

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