Trump's advisers are encouraging him to only attack Pelosi, not Biden or other 2020 contenders [View all]

According to a report at the Washington Post, White House advisers to Donald Trump are encouraging him sometimes to no avail to make House Speaker Nancy Pelosi (D-CA) the main subject of his ire and not former Vice President Joe Biden.
The reason? They fear Trumps attacks on Biden enhances his run to be the Democratic nominee in the 2020 presidential election.
In a deep dive into how both Trumps people and Pelosis advisers view the battle between the two figureheads of their parties is going both claim they are coming out ahead comes news that close advisers to the president prefer talking about Pelosi than Biden because they dont want to give his fledgling campaign more oxygen.
Those same aides also want the president to hold his fire on other Democratic presidential contenders, with the Post reporting, White House aides also said it was better for Trump to be fighting with Pelosi than former vice president Joe Biden or other 2020 candidates, as the president has done recently, elevating their status.
https://www.rawstory.com/2019/05/trumps-advisers-want-him-to-stop-attacking-joe-biden-because-its-only-helping-the-former-veep-with-voters/