What do those three people have in common? The prosecutor in the case, U.S. Attorney Preet Bharara in Manhattan, was an Obama appointee.
Blagojevich was prosecuted by Peter Fitzgerald, the former United States attorney for the Northern District of IL, who is a close friend of former Federal Bureau of Investigation director James Comey, and recently joined Comey's legal team.
The US leader later said he was also considering commuting the sentence of Rod Blagojevich, a former IL governor jailed for corruption, and Stewart, the celebrity chef jailed for five months in 2004-05 for making false statements in an insider trading case.
She served five months in federal prison after a jury convicted her in 2004 of three felonies: conspiracy, obstruction of an agency proceeding, and making false statements to federal investigators. He said previous pardons for former Maricopa County (Arizona) Sheriff Joe Arpaio and former White House aide Lewis "Scooter" Libby fall into the same category.
Trump noted that even though Blagojevich was Democrat, "He's not my party".
White House spokesman Raj Shah echoed D'Souza's claim of selective prosecution.
Blagojevich was convicted of corruption offenses including soliciting bribes for appointment to the U.S. Senate seat Obama vacated after being elected president in 2008.
Trump told reporters Thursday that no one asked him to pardon D'Souza, whose case had become a cause in conservative circles.
Roseanne Barr Apologizes To 'Roseanne' Cast And Crew, Blames Ambien
"While all pharmaceutical treatments have side effects , racism is not a known side effect of any Sanofi medication". He added, "I condemn these statements vehemently" and that her thoughts do not reflect his own "inclusive" views.
Mr Trump said on Thursday D'Souza "was treated very unfairly".
Prosecutors said D'Souza had other individuals donate money to Republican Wendy Long, a Republican who was challenging Sen.
Trump granted the reprieve to D'Souza, who pleaded guilty to exceeding campaign donation limits in contributing to a long-shot Republican Senate candidate in NY.
Trump's announcement that he will pardon D'Souza follows the president's granting last week of a rare posthumous pardon to Jack Johnson, boxing's first black heavyweight champion.
D'Souza in 2012 released an anti-Obama film, "2016: Obama's America", based on his 2010 book, "The Roots of Obama's Rage".
He has stirred controversy on social media for his offensive comments directed towards former President Barack Obama.
In February, he apologized for a flippant tweet about a photo of emotional students from Marjory Stoneman Douglas High School who were witnessing a vote against an assault weapons ban by Florida lawmakers. The students had lost 17 classmates and teachers in a shooting that month. I got to tell you man-to-man you've been screwed, '" D'Souza told "Fox & Friends in an interview.
The tweets have been sharply criticized by some Florida Republicans, including Gov. Rick Scott.