Don Jr. and his girlfriend Kimberly Guilfoyle will travel to California next to headline fundraisers for Trump and Pence's re-election campaign.
Donald Trump Jr raised $3 million in three hours for President Trump's re-election campaign last month and is hitting the road to help any Republican who supports the president's agenda in the upcoming 2020 election.
'Don is going to do what he needs to get the president reelected, protect the majority in the Senate and do his part to help GOP efforts to take the House,' a source close to Trump Jr told DailyMail.com.
'He will do whatever to help those who help his father and his father's agenda,' the person said. ''He's going to give his all.'
The eldest Trump child is leading his older siblings in going all-in to help their father's re-election effort.