Former GOP presidential candidate Mitt Romney to stump for House Speaker and CD 2 candidate Andy Tobin later this month.

First John Boehner came to Arizona to stump for state Rep. Andy Tobin, now it is Mitt Romney's turn.

The former presidential candidate will be in the Phoenix area on May 28 to give his full backing for the Republican candidate for Congressional District 1.

Craig Handzlik, the campaign manager for Tobin's campaign, said Romney would be in the Valley for a "very special event" but could not offer any other details.

Romney endorsed Tobin last month, calling the state house speaker a "battle-tested conservative track record of advocating for Arizona."

"Andy is a proven conservative whose leadership in Arizona has been crucial to cutting state government spending, lowering taxes and fighting to stop Obamacare,” Romney said in press release last month. “He has the courage and resolve we need in Washington. Andy is a leader who will do the right thing for the people of Arizona."

A joint benefit fundraiser called the McSally Tobin Victory Fund, which brought U.S. House Speaker John Boehner to Tucson in March, kicked in more than $17,700 into Tobin's campaign war chest.

Tobin is one of several Republicans candidates running in CD1, with rancher Gary Kiehne and state Rep. Adam Kwasman also seeking the GOP nod.

The winner will face Rep. Ann Kirkpatrick, a Democrat, in the November primary.

Contact reporter Joe Ferguson at or 573-4346. Follow him on Twitter @JoeFerguson