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 eldest son Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE is preparing to hit the campaign trail for Republican candidates ahead of the November midterm elections.

A source close to Trump Jr. says he plans to hold rallies and fundraisers for Republicans, particularly in states and districts where the president’s approval ratings are high.

Axios first reported on Trump Jr.’s plans.

Among Trump Jr.’s early targets ahead of the midterms are several Democratic senators up for reelection in states his father won in 2016: Sens. Joe Manchin Joseph (Joe) ManchinThe Hill's Morning Report - Sponsored by Facebook - Trump, GOP allies prepare for SCOTUS nomination this week Trump meets with potential Supreme Court pick Amy Coney Barrett at White House Names to watch as Trump picks Ginsburg replacement on Supreme Court MORE (W.Va.), Jon Tester Jonathan (Jon) TesterPence seeks to boost Daines in critical Montana Senate race This World Suicide Prevention Day, let's recommit to protecting the lives of our veterans Filibuster fight looms if Democrats retake Senate MORE (Mont.), Claire McCaskill Claire Conner McCaskillMomentum growing among Republicans for Supreme Court vote before Election Day Democratic-linked group runs ads in Kansas GOP Senate primary Trump mocked for low attendance at rally MORE (Mo.) and Joe Donnelly Joseph (Joe) Simon DonnellyTrump meets with potential Supreme Court pick Amy Coney Barrett at White House Names to watch as Trump picks Ginsburg replacement on Supreme Court Momentum growing among Republicans for Supreme Court vote before Election Day MORE (Ind.).

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On Tuesday night, Trump Jr. called West Virginia Senate candidate Patrick Morrisey (R) to congratulate him on his primary election victory. West Virginia might be the first stop on Trump Jr.’s campaign tour.

“There are few people who have a more visceral connection with the GOP base than Don Jr. and he is going to be instrumental in helping to turn them out to vote in November,” a source close to Trump Jr. told The Hill.

Trump Jr. is also adding to his staff ahead of the midterms push. GOP operative Andy Surabian has joined his team and will serve as a political adviser and communications strategist. Surabian is a Trump campaign veteran who also served in the White House as an aide to former chief strategist Stephen Bannon.