The testy Republican Senate primary is seeping into the GOP contest for a House seat.

Nine Republicans have filed to run for the seat of retiring Rep. John Shadegg in the Republican-leaning area of northern Phoenix and its suburbs.

Sen. John McCain has been tapping those Congressional hopefuls on the shoulder and asking for their support in his primary election race against former Rep. J.D. Hayworth.

McCain lined up endorsements from former state Sen. Jim Waring and Paradise Valley Mayor Vernon Parker (R), both of whom want to win the Shadegg seat.

One of their GOP rivals, former state Rep. Sam Crump, is backing Hayworth.

Former state Sen. Pamela Gorman said she wants to stay out of the Senate primary.

In addition to those House hopefuls, others are in the race who have not succumbed to the temptation to give a Senate endorsement. They are attorney Ben Quayle, son of former Vice President Dan Quayle; Arizona Department of Administration Deputy Director Paulina Morris; businessman Steve Moak; and Air Force veteran Robert Branch.