U.S. President Donald Trump said on Monday that Saudi Arabia and other OPEC nations could "more than make up" for any drop in Iranian oil supplies to global markets now that his administration has decided to end waivers that allowed some nations to buy Iranian oil without facing U.S. sanctions.

"Saudi Arabia and others in OPEC will more than make up the Oil Flow difference in our now Full Sanctions on Iranian Oil," Trump said on Twitter.

"Saudi Arabia and others in OPEC will more than make up the Oil Flow difference in our now Full Sanctions on Iranian Oil. Iran is being given VERY BAD advice by @JohnKerry and people who helped him lead the U.S. into the very bad Iran Nuclear Deal. Big violation of Logan Act?"