The Iowa Democratic Party announced on Saturday that Sen. Cory Booker Cory Anthony BookerBipartisan praise pours in after Ginsburg's death DHS opens probe into allegations at Georgia ICE facility Democratic lawmakers call for an investigation into allegations of medical neglect at Georgia ICE facility MORE (D-N.J.) will headline its 2018 Fall Gala next month.

"We’re so excited to welcome @CoryBooker as our keynote speaker for the 2018 Fall Gala! Get your tickets now — trust us, you won’t want to miss this one," the party's Twitter account posted Saturday afternoon.

We’re so excited to welcome @CoryBooker as our keynote speaker for the 2018 Fall Gala! Get your tickets now — trust us, you won’t want to miss this one: https://t.co/Sq1CEAH1QH pic.twitter.com/V2UTabR2B1 — Iowa Democrats (@iowademocrats) September 8, 2018

Tickets for the gala range from $25 to $10,000, according to the event page.

Booker is widely speculated to be a presidential contender in 2020.

Booker, who’s not up for reelection this year, has wielded his sharp criticism of President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's Supreme Court nominee, Brett Kavanaugh, as a way to stand out among other potential 2020 candidates.

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Republicans criticized Booker, who sits on the Senate Judiciary Committee, for releasing "committee confidential" documents on Kavanaugh this week, with some calling the move an audition for 2020.

"Running for president is no excuse for violating the rules of the Senate or of confidentiality of the documents that we are privy to," Sen. John Cornyn John CornynThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Liberal super PAC launches ads targeting vulnerable GOP senators over SCOTUS fight Senate GOP faces pivotal moment on pick for Supreme Court MORE (R-Texas) said.

But according to a spokesman for the Senate Judiciary Committee, Booker was not breaking any confidentiality rules. Tens of thousands of documents have been released to the committee under the label "committee confidential."

Booker joins a number of other possible 2020 contenders who have already begun making visits to crucial states.

Former Vice President Joe Biden Joe BidenOmar fires back at Trump over rally remarks: 'This is my country' Trump mocks Biden appearance, mask use ahead of first debate Trump attacks Omar for criticizing US: 'How did you do where you came from?' MORE has so far made trips to Iowa, Florida and South Carolina, among others. Sen. Bernie Sanders Bernie SandersButtigieg stands in as Pence for Harris's debate practice Bernie Sanders warns of 'nightmare scenario' if Trump refuses election results Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (I-Vt.) has visited Iowa, North Carolina and New Hampshire, Sen. Elizabeth Warren Elizabeth WarrenHarris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda Judd Gregg: The Kamala threat — the Californiaization of America GOP set to release controversial Biden report MORE (D-Mass.) has visited Michigan, Wisconsin and Ohio and Sen. Kamala Harris Kamala HarrisButtigieg stands in as Pence for Harris's debate practice First presidential debate to cover coronavirus, Supreme Court Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (D-Calif.) has made trips to Florida, Virginia and Ohio.