White House communications aide Mercedes Schlapp said Monday she's leaving the administration to work on President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE's reelection campaign.

"Thrilled to be joining the President’s re-election campaign! @realDonaldTrump is the best fighter for the American people we have ever had and he will be re-elected!" Schlapp, the director of strategic communications for the White House, announced on Twitter.

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Campaign manager Brad Parscale Bradley (Brad) James ParscaleMORE said Schlapp, who is Cuban-American, will assist with Latino outreach.

"We are good friends and it's great to have another die-hard @realDonaldTrump supporter!" Parscale tweeted.

Thrilled to be joining the President’s re-election campaign! @realDonaldTrump is the best fighter for the American people we have ever had and he will be re-elected! #MAGA #FourMoreYears https://t.co/bmWepsggPo — Mercedes Schlapp (@mercedesschlapp) July 1, 2019

Trump later expressed his appreciation for Schlapp in a tweet.

I am excited to announce that @MercedesSchlapp will soon be joining our Campaign. She feels so strongly about our Country & its future. We are setting records in so many ways, & we will keep it going. Mercedes has done a fantastic job within the Administration & I am so thankful! — Donald J. Trump (@realDonaldTrump) July 1, 2019

Schlapp joined the White House in September 2017 as a senior adviser for strategic communications.

Her departure comes amid a change in leadership in the White House communications office.

Stephanie Grisham took over this week as press secretary, replacing Sarah Huckabee Sarah Elizabeth SandersSarah Sanders on Trump's reported war dead criticism: 'Those comments didn't happen' Sarah Sanders memoir reportedly says Trump joked she should hook up with Kim Jong Un McEnany stamps her brand on White House press operation MORE Sanders.

Grisham, who previously served as first lady Melania Trump Melania TrumpThe Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power FBI director casts doubt on concerns over mail-in voting fraud Trump: 'We could hardly hear' boos, chanting at Supreme Court MORE's chief spokeswoman, will also fill the role of White House communications director.

It remains to be seen how Grisham will reshape the White House press operation. Sanders's tenure saw the demise of the daily press briefing and increasing tensions between the White House and journalists who cover it.

Grisham made headlines over the weekend when she was roughed up while jostling with North Korean officials to ensure access for U.S. journalists during a meeting between Trump and Kim Jong Un Kim Jong UnPelosi knocks Trump over refusal to commit to peaceful transfer of power Satellite images indicate North Korea preparing for massive military parade South Korea warns of underwater missile test launch by North Korea MORE.

Updated at 6:21 p.m.