Donald Trump still holds a double-digit lead over Republican presidential rival Ted Cruz in a new national poll, but his lead has been nearly shaved in half from where it stood just a month ago.

Trump leads Texas Sen. Ted Cruz 42 percent to 29 percent with Ohio Gov. John Kasich stuck at 18 percent. Just last month, the same poll found Trump leading Cruz by 20 points.

Trump Support on Decline Among men, Very Conservatives

While Trump continues to receive strong support pretty much across the board, his support among men, staunch conservatives and those earning more than $50,000 per year has noticeably dropped. He now tops Cruz among men just 44 percent to 31 percent, with Cruz leading among those who identify as "very conservative" 46 percent to 40 percent.

Pollsters also found that if Kasich were to drop out of the race entirely, Trump would still top Cruz by double-digits, at 48 percent to 38 percent.

Meanwhile, six in ten GOP voters still expect Trump to emerge as the party's official nominee come November's general election, though that is significantly down from the 77 percent of voters who felt that same way as recently as just a month ago. Twenty-two percent of voters now insist they expect Cruz to ultimately rise as the official face of the party.

In addition, Trump is overwhelmingly seen as the candidate most likely to get things done if and when he is voted in as President Barack Obama's successor.

Over half, or 52 percent of all voters choose Trump on this measure, compared to 25 percent for Cruz and 17 percent for Kasich. Beyond that, roughly 70 percent of all GOP voters view Trump as someone who says what he believes.

By comparison, 52 percent of voters are convinced Cruz says what he thinks people want to hear and 40 percent of respondents feel the same way about Kasich.

Trump also rates as the GOP candidate most likely to best handle the economy and illegal immigration. If elected, he has already vowed to mass deport as many as 11 million immigrants and build a massive wall along the Mexican border to keep out all immigrants.

Trump's Support Among Hispanics on Decline

All Trump's fiery and divisive rhetoric has not gone without consequences. A recent Washington Post-Univision national poll found that 80 percent of all Hispanic voters now have a negative view of him.

The poll also found when he is matched up one on one with Democratic frontrunner Hillary Clinton he would lose the Hispanic vote by a 73 percent to 16 percent margin.

Trump doesn't fare much better against fellow democrat and liberal-minded Vermont Sen. Bernie Sanders, losing the Latino vote in that matchup by a whopping 56 points.