The two upcoming by-elections in Karnataka are drawing all eyeballs, even though the results will not affect the stability of the Congress government. With just a year to go for the Assembly polls, these could be seen as an acid test for the fortunes of the Congress in one of the few states where the party is in power. The list of star campaigners includes Chief Minister Siddaramaiah, and BJP state president BS Yeddyurappa, who are putting in huge efforts to campaign extensively in the summer heat.