“In any state where Trump has an approval [rating] of 85 percent or better among GOP primary voters, it’s an effective weapon,” said Steven Law, president of Senate Leadership Fund, the Republican super PAC aligned with Senate Majority Leader Mitch McConnell, while warning every state and every race is different. Ahead of the first round of voting in Alabama’s special Senate election this month, the PAC slammed Rep. Mo Brooks’ over his criticism of Trump in 2016…

The NRSC needs sign-off from the Republican National Committee, which is controlled by Trump appointees, to be able to spend about $500,000 of party funds in coordination with Flake’s campaign. (The Senate committee could still spend that money on independent expenditures, though they are less efficient than spending directly with a campaign.)