For now, Sen. Ted Cruz (R-Texas) is benefiting from an early announcement that he will run for president in 2016, according to new polling data.

Public Policy Polling’s latest poll of likely Republican voters shows Cruz closing in on establishment GOP favorites and likely presidential contenders Scott Walker and Jeb Bush. Support for Cruz has jumped from 5 percent to 16 percent voter support in just over a month.

Walker, meanwhile, saw his support drop 5 percentage points over the past month, but he still leads the GOP pack at 20 percent of national support. Jeb Bush has 17 percent support among likely GOP voters.

Via PPP:

Cruz has really caught fire with voters identifying themselves as ‘very conservative’ since his announcement. After polling at only 11% with them a month ago, he now leads the GOP field with 33% to 25% for Walker and 12% for Carson with no one else in double digits. Last month Walker led with that group and almost all of the decline in his overall support over the last month has come within it as those folks have moved toward Cruz. Cruz’s name recognition with Republican voters has increased from 61% to 82% since his announcement.

The polling agency also noted that Sen. Rand Paul (R-Ky.), who has yet to officially announce whether he’ll run, has enjoyed favorable momentum in the past month. The Kentucky lawmaker, seen as a direct competitor for a portion of the libertarian-leaning GOP voters Cruz is wooing, jumped from 4 percent support to 10 percent in over the month.

While it’s still early, PPP says that the a crowded field for the 2016 GOP primary could mean that Republican voters are in for an experience similar to the party’s 2012 nomination fight.

“A couple of months ago Ben Carson was the hot thing in the field, now Ted Cruz is and Carson’s support is drying up. It’s very reminiscent of the boom and bust we saw with various candidates four years ago,” Dean Debnam, PPP president said of the results. “And Jeb Bush remaining steady as others rise and fall is also similar to how things went for Mitt Romney that cycle.”