President Joe Biden will travel to Israel and onto Jordan Wednesday to meet with both Israeli and Arab leadership, as concerns increase that the raging Israel-Hamas war could expand into a larger regional conflict.

U.S. Secretary of State Antony Blinken announced Biden’s travel to Israel as the humanitarian situation in the Gaza Strip grows more dire and as Israel prepares for a possible ground attack on the 141-square-mile (365-square-kilometer) territory to root out Hamas militants responsible for what U.S. and Israeli officials say was the most lethal assault against Jews since the Holocaust.

Biden is looking to send the strongest message yet that the U.S. is behind Israel. His Democratic administration has pledged military support, sending U.S. carriers and aid to the region. Officials have said they would ask Congress for upward of $2 billion in additional aid for both Israel and Ukraine, which is fighting Russia’s invasion.

Blinken made the announcement early Tuesday after more than seven hours of talks with Israeli Prime Minister Benjamin Netanyahu and other top Israeli officials.

Shortly after in Washington, White House National Security Council spokesman John Kirby announced that Biden would also go to Jordanto meet with King Abdullah, Egyptian President Abdel Fattah el-Sissi and Palestinian President Mahmoud Abbas.

“We’ve been crystal clear about the need for humanitarian aid to be able to continue to flow into Gaza," Kirby said. “That has been a consistent call by President Biden and certainly by this entire administration.”

Truckloads of aid idled Monday at Egypt’s border with Gaza, barred from entry, as residents and humanitarian groups pleaded for water, food and fuel for dying generators, saying the tiny Palestinian territory sealed off by Israel after last week’s rampage by Hamas was near total collapse.

Biden had been scheduled to travel to Pueblo, Colorado, on Monday but decided to postpone the visit so he could consult with his aides and speak with fellow leaders about the unfolding situation in the Middle East.

Gov. Kathy Hochul also announced a trip to Israel on Tuesday.

“During these difficult times, it’s more important than ever for New York to show up in support of Israel. Tomorrow I’ll be traveling to Israel for a solidarity mission where I plan to meet with diplomatic leaders and communities who have been devastated by the horrific Hamas attacks. New York will show the world that we stand with Israel – today, tomorrow and forever," Hochul said in a statement Monday.