None of the four has yet formally launched a campaign and the parties' 2028 nominating contests are more than a year away, leaving plenty of time for new contenders to emerge and for views to change.
President Donald Trump's administration has taken an aggressive approach to election oversight, such as pressing states for voter-registration data, saying stricter measures are needed.
The US-Israeli war against Iran is increasing already high public debt and pushing up interest rates, with creditors questioning whether the US can sustain its outstanding debt of $40 trillion.
"Classified information is not personal property. Leaking it for personal, political, or professional gain is a betrayal of the trust placed in those responsible for keeping it," Parnell wrote.
The canceled in-person rallies were set for Salina, Kansas, on Saturday, and Dubuque, Iowa, on Sunday.
Jason Turkish, the fiancé of El-Sayed primary opponent, Haley Stevens, was among the Jewish attendees who said they were supporting the GOP Senate nominee.
This comes as Trump has made California a focal point of his sweeping immigration crackdown since returning to the White House.
Super PACs and other groups could not file mandatory 24- and 48-hour reports that show how much money they are spending to help or hurt candidates at the polls.
The findings emerged less than a week after the Trump administration filed a federal lawsuit seeking to block certification of Alaska's Senate election.
A hacker is attempting to breach the US Federal Election Commission's systems, forcing the agency to temporarily shut down online services, according to an email seen by Reuters.
Backed by Cenk Uygur, the spot drew criticism for invoking antisemitic tropes about US support for “killing Palestinians.”
