A new Rasmussen poll shows J.D. Hayworth gaining on John McCain:

Incumbent John McCain now earns just 47% support to challenger J.D. Hayworth’s 42% in Arizona’s hotly contested Republican Senate Primary race, according to the latest Rasmussen Reports telephone survey of likely primary voters.

McCain has been losing ground since January when he picked up 53% of the potential GOP Primary vote and Hayworth had only 31% support. Last month, the longtime senator and 2008 GOP presidential candidate earned 48% of the vote, while 41% of likely primary voters supported his challenger.

Meanwhile, Democrat Rodney Glassman trails both of them:

Newly announced Democratic candidate Rodney Glassman, a Tucson City Council member, earns 32% support to Senator John McCain's 54%. Eight percent (8%) would vote for some other candidate, and six percent (6%) are undecided.

If McCain's GOP Primary challenger, former Congressman J.D. Hayworth, is the Republican in the race, he gets 48% support, while Glassman picks up 39% of the vote. Seven percent (7%) would opt for some other candidate, while another seven percent (7%) are undecided.