Republican pollster: GOP voters want their candidates to support Trump's policies and not criticize his behavior

Republican politicians looking to get ahead electorally have a new task in 2018: Not only must they align themselves with the policies of President Donald TrumpDonald John TrumpTrump rallies in Nevada amid Supreme Court flurry: 'We're gonna get Brett' Trump: 'Good news' that Obama is campaigning again Trump boosts Heller, hammers 'Wacky Jacky' opponent in Nevada MORE, they must also refrain from criticizing his personal behavior.

That's the overall message so far for Republicans, veteran GOP pollster Ed Goeas argued in a recent panel discussion on Hill.TV's show "What America's Thinking."

South Carolina Rep. Mark SanfordMarshall (Mark) Clement SanfordMulvaney: Trump regularly asks why Roy Moore lost Dems vow to grab Trump tax returns upon taking majority Insurgency shakes up Democratic establishment MORE was the latest Republican officeholder to learn this lesson after he lost a party primary election last week.

"If you look to his voting record, he's supporting the Trump policies but he did not communicate that well," Goeas told host Joe Concha.

"What America's Thinking" airs weekdays at 1pm ET on Hill.TV.