On Monday, Trump, the presumptive Republican presidential nominee, implied Obama was secretly supporting terrorists, as evidenced by his refusal to call attacks like Sunday's massacre at an Orlando, Florida, gay nightclub "radical Islamic" terrorism.
"People cannot believe that President Obama is acting the way he acts and can't even mention the words radical Islamic terrorism," Trump said on Fox News. "There's something going on. It's inconceivable. There's something going on."
"He doesn't get it or he gets it better than anybody understands," Trump said later in the interview. "It's one or the other, and either one is unacceptable."
See some of the reaction to the deadly attack:
Celebrities react to the Orlando shooiting
White House: Obama's record on terrorism includes 'a lot of dead terrorists'
The tragedy in Orlando is just beyond sad. My deepest regrets to all those suffering. There are no words that suffice. I'm...stunned.
Horrified by the mass shooting in Orlando. When will we do something to prevent these killing sprees?
Heartbroken about the shooting in Orlando. My prayers and thoughts are with you all in America. I pray for this world to change!
Tweeting about this kind of tragedy feels so insignificant. But let's all pray for Orlando FL today. And the world. I'm in disbelief.
Unspeakable. So much suffering today. My heart goes out to the families of the victims in Orlando. #Pride
Another embarrassing day to be a human. My thoughts and prayers are with #orlando, the #LGBT community and sane people everywhere.
Knowing there are people in this world who are celebrating the massacre in #Orlando sickens me. The God I love LOVES EVERYONE!!!!
❤️Sad day.... My heart and love goes out to all the families effected by this senseless shooting and killing of innocent loved ones #Orlando
I don't really wanna finger-point and fight about this. I just want to be sad. #Orlando
Madness. Hideous and cruel madness. To the survivors, and families of those slain, I'm so sorry. #StopGunViolence
Waking up to this horrifying and heartbreaking news. I don't know what to say anymore. #PrayForHumanity #Orlando ❤️💛💚💙💜
To our gay, lesbian, bisexual, & trans friends-- the world is mourning. #LOVENOTHATE
Can't even fathom what the people in Orlando are going through right now. My prayers are with the victims' families & all those affected...
How many people have to be killed before we act as a nation to #EndGunViolence? #Orlando @Everytown @MomsDemand https://t.co/UBeBearjF2
My thoughts and prayers are w my brothers and sisters who were at Orlando's Pulse Nightclub. RIP to those who lost their lives.
I am speechless, sick, and so sad reading the news from Orlando. Sending strength to my gay brothers and sisters. 50 people!!!! FIFTY
I'm heartbroken by this tragedy. Praying for Orlando and the suffering created by this senseless violence.
Sickening news. All my love to Orlando.
I am heartbroken..My thoughts and prayers are with those affected by last night's tragedy in Orlando. 💔
Seeing the news this morning & my heart truly hurts. My thoughts and prayers are with all the victims families.. https://t.co/phACO5YV4N
How how how how can one have so much hate ????? My heart...... is so broken. Praying for the families of the Orlando victims. I am so sorry.
Just now catching up on the tragedy in Orlando... Sickening. Praying.
I'm heartbroken over this hate crime 💔 Thoughts and prayers go out to the people of Orlando 🙏
Love is the only answer. #prayfororlando
My heart goes out to the victims and their families. Our community has suffered a tremendous loss. We must stand together more than ever.
Heartbroken. Scared. Angry. So much senseless death in Orlando & across this country. Sending love & prayers to all suffering. Horrific
I'm heartbroken for the victims, for Orlando, for the LGBT community, for our country. When does it end?
I'm horrified & deeply saddened by the senseless, tragic shooting in #Orlando. My heart breaks for the victims, their families & loved ones.
Horrified watching the news. Where has the love in our world gone. Honestly I don't know what to say. So sad. So wrong #PrayingForOrlando
NO WORDS GOOD ENOUGH😫‼️WHEN UR HURT, WOUNDED, MURDERED WE ALL CRY‼️WE ALL MOURN ‼️WE R ALL LESS WITHOUT U MY EXTENDED FAMILY😥😭‼️#URNOTALONE
Saddened by the news this morning. Such a shame. My thoughts and prayers go out to those affected in Orlando.
I'm truly at a loss for words. To everyone in Orlando affected by this massacre, my thoughts, love, & prayers are with u ❤️💛💚💙💜
Hearing about this senseless & horrific tragedy in #Orlando. Heartbroken for my LGBTQ brothers & sisters. Time for change. #GunControlNow
Pray for the #Orlando community.
Pray for the #LGBT community.
Pray for the American community. https://t.co/lpRojXLl1R
My heart goes out to the victims and families of the horrific tragedy in Orlando. What has this world come to? Shocking!
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And on NBC, Trump said "many people" think Obama is turning a blind eye and allowing terrorism to fester.
"A lot of people think maybe he doesn't want to know about it. I happen to think that he just doesn't know what he's doing," he said. "But there are many people that think maybe he doesn't want to get it."
Drone strikes undertaken on Obama's orders have killed more than 3,400 militants, according to a January analysis by the Council on Foreign Relations.
In his final State of the Union address in January, Obama made a similar quip defending his record.
"ISIL will learn the same lessons as terrorists before them," Obama said, using an alternate name for the Islamic State group. "If you doubt America's commitment – or mine – to see that justice is done, ask Osama bin Laden."
"Ask the leader of al Qaeda in Yemen, who was taken out last year, or the perpetrator of the Benghazi attacks, who sits in a prison cell," he continued. "When you come after Americans, we go after you. It may take time, but we have long memories, and our reach has no limit."
On Monday, Earnest told reporters that the president was hardly worried about Trump's thinly veiled insults. Obama, he said, was too busy being president to pay attention to Trump.
"When you are focused on something as big as helping the country respond to the worst mass shooting in our nation's history," Earnest said, "when you are focused on something as big as safeguarding the country and combating violent extremism, it's important not to get distracted by things that are so small."