RNC announces stricter requirements for 2nd GOP debate as candidates scramble to qualify amid Trump uncertainty

Candidates must reach higher polling and fundraising thresholds for second 2024 Republican debate in September.
Trump meets current requirements but hasn't committed to attending debates; Pence predicts he'll qualify soon.
candidates have qualified for first debate, including Trump, DeSantis and Haley.
Qualifying polls must be recent national or early state polls approved by RNC.
RNC Chair McDaniel compares debate stage to "Olympics" and says standards ensure strong nominee.