The fate of US aid to Ukraine hung in the balance Tuesday as House Speaker Mike Johnson faced potential revolt from within his Republican party over his complex plan to renew the long-delayed funding along with fresh assistance for Israel. Several members voiced outrage at the $95 billion plan and raised the prospect of a vote on removing Johnson from his position -- as was done to his predecessor. Far-right firebrand Marjorie Taylor Greene, a close ally of Donald Trump who opposes any compromise with Democrats, said that Johnson's days are numbered.

WHY THE HOUSE GOP CONTINUES TO TARGET ITS LEADERS

Israel has vowed to respond to Iran's unprecedented attack and to send troops into Gaza's overcrowded Rafah area in its war against Hamas, but experts say it cannot achieve both goals simultaneously. Israeli Prime Minister Benjamin Netanyahu has appeared determined to move ahead on both fronts but has not offered a timeline for either. He would likely have to take into account pleas from top ally the US for restraint after Tehran's drone and missile attack -- as well as calls for the protection of Palestinian civilians in the besieged Gaza Strip.

SEE THE PROS AND CONS OF A DOUBLE-EDGED RESPONSE

Treasury Secretary Janet Yellen warned Tuesday of more sanctions targeting Iran following its unprecedented attack on Israel, saying she expects the US to take further action against Iran "in the coming days." Tensions have soared even higher with Iran's direct assault on Israel, in retaliation for a deadly strike on Iran's consulate in Syria, prompting appeals for de-escalation by world leaders fearing wider conflict.

SEE THE OPTIONS THE US IS CONSIDERING AGAINST IRAN

What are the five nations currently facing sanctions from the US?

Tuesday's answer: The term "smartphone" was first used by Ericsson in 1997 advertising to describe a new device concept, the GS88.