Trump: 46 percent.

Cruz: 44 percent.

Trump: 42 percent.

Cruz: 32 percent.

Kasich: 22 percent.

Billionaire developer Donald Trump and Texas Sen. Ted Cruz are virtually tied in a head-to-head race among Republican presidential voters, according to a national poll released Tuesday.Here are the results of theof 505 GOP voters, conducted between Thursday and Saturday:However, in a battle involving Ohio Gov. John Kasich, the New York developer leads the field:The survey also found that 51 percent of Kasich supporters would back Cruz, versus 23 percent who said they would vote for Trump."The Republican race nationally would be a toss-up if it was just Trump and Cruz," said Dean Debnam, president of Public Policy Polling, in analyzing the results."But as long as Kasich stays in there splitting the anti-Trump vote, Trump continues to be in a good position," he said.The poll has a margin of error of 4.4 percent.