koch brothers

Charles (left) and David Koch


Gov. Scott Walker’s calendar is filling up with more events hinting at a 2016 presidential run.

Walker plans to attend an event this weekend in Palm Springs, California, at a private gathering sponsored by a Koch brothers affiliated group, campaign spokesman Tom Evenson confirmed Tuesday.

Politico first reported Tuesday that Walker will join three other presidential hopefuls at the event: Sens. Ted Cruz of Texas, Rand Paul of Kentucky and Marco Rubio of Florida. The event is sponsored by Freedom Partners, which the online political publication describes as "the nonprofit group that oversees the network of fiscally conservative groups formed with help from (billionaires Charles and David Koch) and their operatives."

The 501(c)6 group spent more than $300 million between 2011 and 2013 promoting free market principles, according to the group's IRS forms.

Walker’s campaign confirmed Monday that he will speak at a major annual conservative conference in Washington, D.C., next month. And the second-term Republican governor told reporters he may make his first trip to Israel later this year.

Walker’s speech at the Conservative Political Action Conference would be another stop on the circuit for 2016 GOP presidential contenders. He’s scheduled to speak at the Iowa Freedom Summit in Des Moines on Saturday and last week spoke at a Republican National Committee dinner in San Diego.

Walker will speak at CPAC, which runs from Feb. 23-28 in Washington, Walker campaign spokesman Tom Evenson confirmed Monday. Organizers also listed Walker among the featured speakers and posted Walker’s bio on the event website.

Other possible presidential contenders scheduled to speak at the event so far include U.S. Sen. Rand Paul of Kentucky, Louisiana Gov. Bobby Jindal, U.S. Sen. Ted Cruz of Texas and Dr. Ben Carson.

Walker spoke at the conference in 2012 and 2013.

Meanwhile, Walker told reporters Monday that he’s had multiple requests to go to Israel “so we’ll probably try to find a way.” He said the general counsel’s office in Israel has asked him to come and talk about water technology.

He also suggested it could be part of a trade mission, such as those he’s taken to other countries such as China and Japan.

Walker and other potential presidential hopefuls spoke at the Republican Jewish Coalition spring meeting last year. He has also met multiple times with billionaire casino magnate and GOP donor Sheldon Adelson.

Walker has said Adelson talked with him about his views on Israel during their visits.

Reporter Matthew DeFour of the State Journal and reporter Scott Bauer of The Associated Press contributed to this report.