Ryan is expected at presidential campaign fundraising events Sunday in West Hartford, Darien and Greenwich.
State Democrats say Republican U.S. Senate candidate Linda McMahon and GOP congressional candidate Andrew Roraback have positions on Social Security and Medicare that are in line with those of Ryan, but are trying to portray themselves as moderates.
The campaigns of McMahon and Roraback deny the Democrats' charges.
Neither McMahon nor Roraback plan to attend the fundraisers with Ryan because of scheduling conflicts.
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