Conservative reporter Henry Rodgers called a recent poll showing President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE trailing former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE and Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) “very concerning.”

“This is a warning sign for Trump, he needs to step it up,” Rodgers, who is a reporter the conservative outlet The Daily Caller, told Hill.TV during an appearance on "Rising."

“Maybe he needs to take another trip down to Wisconsin, do a little rally” he added.

Rodger's comments come after a Marquette University Law poll released on Wednesday found Biden leading Trump by 9 points.

Fifty-one percent of Wisconsin voters said they supported Biden, while 42 percent of those polled voiced support for Trump.

The same survey found Sanders ahead of Trump by four points at 48 percent compared to Trump’s 44 percent support.

Meanwhile, Trump tied with Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE (D-Mass.), each receiving 45 percent support.

Wisconsin is considered a must-win state for Democrats in the 2020 elections.

President Trump unexpectedly won the state’s 10 electoral votes in the 2016 election by a narrow margin over Hillary Clinton Hillary Diane Rodham ClintonBloomberg rolls out M ad buy to boost Biden in Florida Hillicon Valley: Productivity, fatigue, cybersecurity emerge as top concerns amid pandemic | Facebook critics launch alternative oversight board | Google to temporarily bar election ads after polls close Trump pledges to make Juneteenth a federal holiday, designate KKK a terrorist group in pitch to Black voters MORE.

—Tess Bonn