President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE defended his immigration executive order early Monday, arguing he could not have announced the temporary ban in advance because "bad" people would've rushed into the United States.

“If the ban were announced with a one week notice, the ‘bad’ would rush into our country during that week. A lot of bad ‘dudes’ out there!” Trump wrote on Twitter.

If the ban were announced with a one week notice, the "bad" would rush into our country during that week. A lot of bad "dudes" out there! — Donald J. Trump (@realDonaldTrump) January 30, 2017

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Trump on Friday signed an executive order that imposed a 90-day ban on nationals from seven predominantly Muslim countries entering the United States. The order also included a 120-day ban on admitting refugees and an indefinite halt on admitting refugees from war-ravaged Syria.

The ban caused confusion at airports over the weekend as border patrol officials sought to comply with the new order.

Protests erupted at airports throughout the country after multiple people were detained.