Rand PaulRandal (Rand) Howard PaulOvernight Defense: Senate confirms Haspel as CIA chief | Trump offers Kim 'protections' if he gives up nukes | Dem amendments target Trump military parade Hillicon Valley: Lawmakers target Chinese tech giants | Dems move to save top cyber post | Trump gets a new CIA chief | Ryan delays election security briefing | Twitter CEO meets lawmakers Overnight Finance: Watchdog weighs probe into handling of Cohen bank records | Immigration fight threatens farm bill | House panel rebukes Trump on ZTE | Trump raises doubts about trade deal with China MORE continues to hold a wide lead in the GOP Senate primary in Kentucky, but could Sen. Mitch McConnellAddison (Mitch) Mitchell McConnellGOP lawmakers want Trump to stop bashing Congress Parkland father calls out Trump, McConnell, Ryan after Santa Fe shooting Overnight Finance: House rejects farm bill in conservative revolt | NAFTA deal remains elusive as talks drag on | Dodd-Frank rollback set for House vote MORE's (R-Ky.) popularity tip the race?

A new Public Policy Polling (D) survey shows Paul leading Kentucky Secretary of State Trey Grayson 46-28 with two weeks left in their race. The poll comes a day after Grayson's campaign released a poll showing the race knotted at 40. All other recent polling has shown Paul leading the race by double digits.

Grayson sought to thwart some of Paul's momentum Tuesday by announcing the endorsement of McConnell, who generally shies away from contested primaries.

PPP shows McConnell's approval rating among Republican voters at 68 percent positive and 20 percent negative, so his endorsement could be a good one for Grayson. That is, as long as the anti-Washington sentiment doesn't trump McConnell's popularity.

A concurrent PPP poll of the Democratic primary shows it narrowing somewhat, with state Attorney General Jack Conway getting to within single digits of Lt. Gov. Dan Mongiardo. Mongiardo, who has also led by double digits for much of the race, now leads 36-27.

The primary is May 18th.