5) Sen. John McCain waded into Arizona's 6th District member-vs.member primary Wednesday, endorsing Rep. Ben Quayle while chastising his opponent, Rep. David Schweikert, for his campaign tactics. At a news conference, McCain held up a Schweikert mail piece that says Quayle "goes both ways," calling is "not appropriate" and "not acceptable," the Arizona Republic reports. 4) Sen. Robert Casey, D-Pa., remains well ahead of his GOP challenger, Tom Smith, according to a new Franklin & Marshall College poll conducted for a number of Keystone State media outlets and released Thursday. Casey holds a 15-point lead, 43 percent to 28 percent, though nearly a quarter of voters are undecided. The vast majority of voters, 68 percent, do not recognize Smith's name, underscoring his challenge against the widely-known Casey. 3) A new Democratic poll released Thursday is the second survey in as many weeks to show Rep. Joe Donnelly, D-Ind., virtually tied with Indiana state Treasurer Richard Mourdock in the race to replace Sen. Richard Lugar, R-Ind. The new poll of 601 likely voters, conducted Aug. 9-12 by Garin-Hart-Yang Research Group for Majority PAC and Center Forward, shows Donnelly marginally ahead of Mourdock, 45 percent to 43 percent (within the poll's margin of error of plus-or-minus 4 percentage points). A Donnelly internal survey released last week showed the Democrat ahead by a single point. 2) More speakers announced for the Republican National Convention in Tampa -- including Democrat-turned-Republican Artur Davis, who seconded Obama's nomination at the 2008 Democratic Convention. The other speakers include one Senate candidate and several politicians who had been floated as VP possibilities: New Hampshire Sen. Kelly Ayotte, Louisiana Gov. Bobby Jindal, Rep. Connie Mack (running for Florida Senate), Virginia Gov. Bob McDonnell, and Ohio Sen. Rob Portman. 1) Majority PAC and the League of Conservation Voters are launching a $1.6 million ad campaign targeting George Allen in the Virginia Senate race. Two separate ads will begin airing tonight, check them out here and here.