As President TrumpDonald John TrumpThe Hill's Campaign Report: Democratic field begins to shrink ahead of critical stretch To ward off recession, Trump should keep his mouth and smartphone shut Trump: 'Who is our bigger enemy,' Fed chief or Chinese leader? MORE dug in this week on his attacks on a group of minority freshman lawmakers, Twitter users compared him to his predecessor by using the hashtag #ObamaWasBetterAt.

The hashtag was the top trending phrase in the U.S. as of Tuesday morning, with nearly 50,000 tweets proclaiming what people thought former President Obama did better than Trump. 

While supporters of Obama boasted that he was better than Trump at "executive leadership," "marriage" and "being a human being," pro-Trump Twitter users also used the hashtag to suggest that Obama was better at "caving to terrorists" and "lying to the American people."

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Trump sparked a political firestorm this week after tweeting Sunday that a group of four nonwhite lawmakers should "go back and help fix the totally broken and crime infested places from which they came."

The tweet was aimed at four freshman congresswomen: Democratic Reps. Ilhan OmarIlhan OmarTrump to return to North Carolina to stump for special election candidate Former GOP Rep. Jason Lewis says he'll challenge Tina Smith in Minnesota Israel should resist Trump's efforts to politicize support MORE (Minn.), Rashida TlaibRashida Harbi TlaibMichigan city declines to renew contract with ICE to hold detainees Former GOP Rep. Jason Lewis says he'll challenge Tina Smith in Minnesota Israel should resist Trump's efforts to politicize support MORE (Mich.), Alexandria Ocasio-CortezAlexandria Ocasio-CortezThe Memo: Dangers loom for Trump on immigration Students retreating from politics as campuses become progressive playgrounds Former GOP Rep. Jason Lewis says he'll challenge Tina Smith in Minnesota MORE (N.Y.) and Ayanna PressleyAyanna PressleyFormer GOP Rep. Jason Lewis says he'll challenge Tina Smith in Minnesota Poll: Voters split on whether it's acceptable for Israel to deny Omar, Tlaib visas NJ college censures trustee over posts targeting 'the squad' MORE (Mass.). All four are U.S. citizens, and only Omar was born outside the U.S. 

Many Democrats and a handful of Republicans slammed the tweet as racist, and the House is expected to vote Tuesday on a resolution to condemn the president's comments. 

The president continued his criticism of the women on Tuesday, accusing them in a tweet of "spewing some of the most vile, hateful, and disgusting things ever said by a politician."