The amounts of money, time and political uncertainty trouble executives at large Western oil companies, who plan to meet with President Trump on Friday.

The White House welcomed a surprise visitor on Friday. Tucker Carlson, the former Fox News star who has found himself at the center of a MAGA civil war in recent months, attended a meeting at the White House with oil and gas company executives about the Trump administration’s invasion of Venezuela and seizure of its oil reserves.

President Donald Trump marveled at the ongoing White House construction ahead of a meeting with oil executives.

The CEOs of ConocoPhillips, Exxon, and Shell are at the meeting, along with representatives from Chevron, Halliburton, Valero, and Marathon.