Story highlights Democratic front-runner Hillary Clinton has avoided national media interviews since announcing her presidential bid

Vermont Sen. Bernie Sanders has narrowed the gap in recent polls

Washington (CNN) Hillary Clinton on Tuesday will give the first nationally televised interview of her presidential campaign to CNN senior political correspondent Brianna Keilar.

The Democratic front-runner has largely stayed away from the press, only occasionally taking questions from reporters and granting interviews to local news outlets in early-voting states like Iowa and New Hampshire.

But she hasn't granted national outlets interviews since jumping into the 2016 race in April. The first one, with Keilar, will take place in Iowa City, as Clinton campaigns in the first state to vote in the presidential nominating process.

Clinton's status as her party's favorite isn't in doubt, but Vermont Sen. Bernie Sanders has narrowed the gap in recent polls, particularly in New Hampshire and Iowa.

A CNN/ORC poll conducted June 18-24 found that Clinton's lead in New Hampshire had dwindled to eight percentage points, with 43% of the Granite State's Democrats backing her while 35% support Sanders.

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