Donald Trump Jr. prepares for stepped up role in 2018 midterm elections

Trump Jr. has already been involved in elections this year. He has raised money for select candidates, addressed the Republican National Committee at their meeting last week in Florida and campaigned for failed House candidate Rick Saccone in a special election earlier this year.

The source said the Trump son wants to get more involved and views the midterms as a critical opportunity to bolster the Republican Party and his father's presidency.

Trump Jr. will particularly focus on West Virginia, Missouri, Montana and Indiana, four states that have key Senate races where Republicans are looking to unseat Democrats in states Trump won in 2016, and on defending House seats in districts where the President has a high approval rating, the sources said.

The sources added this will extend beyond just fundraising and will likely include Trump Jr. headlining events for candidates.

Trump Jr.'s increased involvement in the midterms was first reported by Axios.

Trump's son signaled this uptick in involvement earlier this month when he urged West Virginia Republicans to reject Don Blankenship, the ex-con coal baron who ran for the West Virginia Republican Senate nomination. The President weighed in a few days later and Blankenship went on to lose the race to West Virginia Attorney General Patrick Morrisey.

Nachama Soloveichik, a spokeswoman for Morrisey, confirmed on Thursday the Senate candidate and Trump Jr. spoke shortly after the race was called and both expressed an interest in having Trump's son involved in the race.

In addition to his planned travel, Trump's son has also hired Andy Surabian, a former Trump campaign aide, to provide political advice and communication help in his midterm effort.