WASHINGTON (CNN) -- Saying they are "disappointed" with President Bush's renewed veto threat on the Iraq war supplemental, Senate Democratic leaders on Wednesday invited the president to Capitol Hill at the end of the week to discuss the measure.

"We respectfully request that you consider coming to Capitol Hill this Friday to meet with Democratic and Republican members of the United States Senate in an effort to begin bridging the differences between your Iraq policy and that supported by the Congress late last month," Senate Majority Leader Harry Reid of Nevada wrote in a letter to Bush. (Read full letter [PDF])

The letter was also signed by Senate Majority Whip Dick Durbin of Illinois, Democratic Senatorial Campaign Committee Chairman Chuck Schumer of New York, and Majority Conference Secretary Sen. Patty Murray of Washington.

On Tuesday, the president invited congressional leaders from both parties to the White House next week to discuss the measure, an invitation Reid is considering rejecting if the president maintains that he will veto any bill with a withdrawal timeline.