Washington (CNN) – Arizona Sen. John McCain picked up his second high profile endorsement in as many days Wednesday.
A day after Americans for Tax Reform president Grover Norquist lined up behind McCain, the Arizona Republican Congressional delegation announced Wednesday it too will support the four-term senator.
"It's an honor to serve with my friend John McCain in the United States Senate and I believe he is the right man at the right time to represent Arizona's conservative values in Washington," said Senate Republican Whip Jon Kyl in a statement.
Reps. Jeff Flake, Trent Franks and John Shadegg also added their support in the statement released by the McCain campaign.
Among McCain's challengers in the Arizona primary is talk show host J.D. Hayworth, a former Arizona congressman. Chris Simcox, a co-founder of the Minuteman movement, is also challenging McCain.