Washington (CNN) Hillary Clinton is getting more involved in the 2018 midterms.

Clinton, through her political organization Onward Together, donated the maximum of $5,000 to 19 Democratic House candidates and four secretary of state candidates in June, according to the group's filings with the Federal Election Commission. The donations represent the most concentrated midterm effort the former Democratic presidential nominee has made to date and further thrust Clinton into an election that will be the most potent judgment on Trump since he defeated her two years earlier.

Eleven of the House candidates who received donations from Clinton are vying to flip districts represented by Republicans in Congress that she won in 2016.

Representatives from Clinton's team and the Democratic Congressional Campaign Committee worked together to target which candidates Clinton should back to stay in line with the party's 2018 strategy, officials with both groups tell CNN.

While the former Democratic nominee has publicly endorsed Democrats on the ballot in November, she has yet to publicly hit the campaign trail and has largely kept her distance from 2018 campaign politics. One reason is strategic: Republicans are eager to tie Democratic candidates, especially those running in districts that lean Republican, to national figures like Clinton, a fact people close to the former secretary of state is well aware of.

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