President Donald Trump on Thursday threatened to double tariffs on Mexico, unless it stops migrant caravans headed toward the U.S., while casting Republicans’ sweeping midterm defeat as merely a “perceived loss.”

“With the perceived loss by the Republicans in the Midterms - I WAS NOT ON THE BALLOT- the INVASION of our Country is taking place again. Huge CARAVANS are forming and beginning their illegal march through Mexico,” Trump wrote on Truth Social, reviving a frequent line of attack on immigrants.

“Many of the people in these Caravans are those that various countries don’t want - ‘Send them to America,’ they say - But they will not be accepted! MEXICO MUST STOP THEM, NOW, and if they do not do so, the Tariffs on Mexico will be IMMEDIATELY DOUBLED. MEXICO, THE GOVERNOR OF TEXAS, THE VERY LIBERAL NEW GOVERNOR OF TEXAS, OUR GREAT BORDER PATROL, & ICE, HAVE BEEN SO INFORMED. There will be no leniency!” he continued.